93969262… - 0. We need to prove this equation. (ii) cos A + cos 3 A + cos 5 A + cos 7 A = 4 cos A cos 2 A cos 4 A. The trigonometry ratio of the angle is given as. Download Solution PDF. Free math problem solver answers your - Bentuk pertanyaan cos 140 derajat - cos 100 derajat_____sin 140 derajat - sin 100 derajatmohon bantuannya:) - Lihat pembahasan Halo keren untuk mengerjakan soal ini kita harus ingat. mrof eht gnisu dna fo seulav eht dniF .49240387 - 0. Trigonometry.. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more. Statistika 4. Log in Join. step5: sine difference identity. Trigonometry Graph sin (-100)cos (140)-sin (140)sin (-100) sin(−100) cos(140) − sin (140) sin(−100) sin ( - 100) cos ( 140) - sin ( 140) sin ( - 100) Use the slope-intercept form to … Solve cos140-cos100/sin140^circ-sin100^circ= | Microsoft Math Solver Solve your math problems using our free math solver with step-by-step solutions. C 23, cos 60° cos 20°-sin 60° sin 20° 24. Study Resources. Calculate sin(100)° Determine quadrant: Since 90 100 180 degrees it is located in Quadrant II sin is positive. 8α3 − 6α = 2 cos300∘ = 1 . Download Solution PDF. Verified answer. 1 1. 88° 88 °. cos 40 + sin 200 . cot 100 Use a calculator to find each of the following: sin 32 ° \text{sin}\ 32\degree sin 32° and cos 58 ° \text{cos}\ 58\degree cos 58°; sin 17 ° \text{sin}\ 17\degree sin 17° and cos 73 ° \text{cos}\ 73\degree cos 73°; sin 50 ° \text{sin}\ 50\degree sin 50° and cos 40 ° \text{cos}\ 40\degree cos 40°; sin 88 ° \text{sin}\ 88\degree sin Detailed Solution. cos (180°-x ) = -cos x 3. Tonton video. 2 c $$\frac{\sin^2(20)}{\sin(140)\sin(80)} = \frac{\cos(80)}{\cos(20)}$$ Any help or hints will be appreciated. sin 50 degrees = 0. 1. View Solution. We know, using degree to radian conversion, θ in radians = θ in degrees × ( pi /180°) Study with Quizlet and memorize flashcards containing terms like Choose a justification for each step in the derivation of the sine difference identity. Using the formula for sine of difference of two angles that is, sin (A-B) = (sin A cos B - cos A sin B), the expression can very easily be evaluated.7) r 2 = x 2 + y 2 and tan θ = y x. I have been stuck for quite some time! Thank you in advance. Jim G. cos 112° cos 45° + sin 112° sin 45° Found 2 solutions by ikleyn, MathTherapy: Answer by ikleyn(49693) (Show Source): You can put this solution on YOUR website!. sin50° = 0. .0016. Find the product z_1z_2 z1z2, where : z_1=3 (\cos {20\degree}+i\sin {20\degree}) \text { and }z_2=4 (\cos {220\degree}+i\sin {220\degree}) z1 = 3(cos20°+isin20°) and z2 = 4(cos220 Bài 4 trang 71 Toán lớp 10 Tập 1: Tính giá trị đúng của các biểu thức sau (không dùng máy tính cầm tay): a) A = cos 0° + cos 40° + cos 120° + cos 140°; b) B = sin 5° + sin 150° – sin 175° + sin 180°; c) C = cos 15° + cos 35° – sin 75° – sin 55°; d) D = tan 25° . 0.36i+4.Sin½(A-B) Cos A - Cos B = -2. Teks video. step1: conduction identity.7660444. Calculate sin(140)° Determine quadrant: Since 90 140 180 degrees it is located in Quadrant II sin is positive. 2 Answers Narad T. Precalculus. Calculus questions and answers.. The Greeks focused on the calculation of chords, while mathematicians in India created the earliest 7. Sebuah industri rumah tangga madu herbal menghasilkan produk madu khusus dalam bentuk kemasan botol 250 ml selama 1 tahun.0-( noitcesretni fo tniop eht fo )667.Sin½(A-B) Sudut berelasi : Sin (180° - A) = Sin A Cos (180° - A) = - Cos A Identitas trigonometri Tan A = Sin A/Cos A Nilai sudut istimewa dari Tan 60° = √3 Pembahasan : (Cos 140° - Cos 100°)/(Sin 140° - Sin 100 The expression evaluates to ' 1 '. Question: Use an appropriate sum or difference identity to find the exact value of each of the following. Step 1/4. Study Resources. Enter angle in degrees or radians: the angles that have the same initial side and share the terminal sides. Write the expression as the sine, cosine, or tangent of an angle. Prove that: (i) cos 3 A + cos 5 A + cos 7 A + cos 15 A = 4 cos 4 A cos 5 A cos 6 A. Solved by verified expert. To find the exact value of sin(140°)cos(20°) - cos(140°)sin(20°), we can use the angle addition formula for sine: The product sin(80) sin(60) sin(80) sin(60) can be expressed as a sum of trigonometric terms: (1/4) [cos(20) - cos(140) - cos(100) + cos(220)]. Aug 5, 2017 #sin190^@# Explanation: Jawaban paling sesuai dengan pertanyaan Nilai dari (cos 140^(@)-cos 100^(@))/(sin 140^(@)-sin 100^(@))=. Determine angle type: 140 > 90°, so it is obtuse sin(140) = 0. Histogram, Poligon Distribusi Frekuensi dan Ogive.17364817… - 0. Mapa do Site. Kaidah Pencacahan 1. . Trigonometry Graph sin (-100)cos (140)-sin (140)sin (-100) sin(−100) cos(140) − sin (140) sin(−100) sin ( - 100) cos ( 140) - sin ( 140) sin ( - 100) Use the slope-intercept form to find the slope and y-intercept. Tap for more steps 0. What are Trigonometric functions? Trigonometric functions are defined as the functions which show the relationship between the angle and sides of a right-angled triangle. sin2100∘ (1 + 4 cos100∘)2 cos2100∘ = (1 −α2)(1 + 4α)2 α2 = 1 + 8α + 15α2 − 8α3 − 16α4 α2 = 8α3 − 6α + 8α + 15α2 99. For the first cosine function, we have: 100 cos(300t +45∘) = 100cos(300t) cos(45∘) − sin(300t) sin(45∘) 100 cos ( 300 t The exact value of the given trigonometric function sin(140°)cos(20°) - cos(140°)sin(20°) is -√3/2. Express your answers in polar form. sin A - sin B = 2 cos \(\rm\frac{A+B}{2}\) cos 20° + cos 100° + cos 140° = 0.1. Determine angle type: 100 > 90°, so it is obtuse cos(100) = -0. Teks video. (**) com (196- (") -. cos 45° = sin 45° = 1/√2. Find the Exact Value. To find cos(140°), we can use the cosine of a supplementary angle: cos(140°) = -cos(180° - 140°) = -cos(40°). The slope-intercept form is , where is the slope and is the y-intercept. Exact Trigonometric Function Values. Dia Determine the values of the indicated functions in the given manner. Nyatakan setiap bentuk berikut sebagai selisih sinus. To find the exact value of sin(140°)cos(20°) – cos(140°)sin(20°), we … The product sin(80) sin(60) sin(80) sin(60) can be expressed as a sum of trigonometric terms: (1/4) [cos(20) - cos(140) - cos(100) + cos(220)]. Precalculus. tan 115°; e) E = cot 10 The value of the expression cos20∘cos100∘ +cos100∘cos140∘ −cos140∘cos200∘ is. Q 4. Calculus.. 160 + 80 160 - 80 sin (140°) - sin (100°) = 2 cos 09 since = 2 co ( 160 + 80 -)-- 160-80 x ) = 2 cos ( 110 ,) sin ( 30 ) = 2 (C ) sin (200) = 2 cos sin (209) -sin 20 Remember to Math Subjects. Answer to cos 140 ° cos 50 ° − sin 140 ° sin 50 ° what AI Homework Help. Thanks for the feedback. Question 1018132: Write the expression as the sine, cosine, or tangent of an angle. For the first question, let α = cos100∘ α = cos 100 ∘. Step 1. Bank Soal Relasi dan Fungsi dan Pembahasan. Find the dimensions of the picture if the perimeter is 74. If you want sine 50° with higher The trigonometric functions are periodic. ⇒ cos 140° = cos 500° = cos 860°, and so on.643j) (Distribute 7 to the numbers in brackets) v=-5. Use our cos (x) calculator to find the cosine of 140 degrees - cos (140 °) - or the cosine of any angle in degrees and in radians. step7: cosine function is even, sine function is odd. Verified by Toppr. The cos of 140 degrees equals the x-coordinate (-0. Expert Answer. Last updated on Jul 10, 2023 The National Institute of Technology released the results of the NIT MCA Common Entrance Test 2022 or NIMCET.64278761182538 Excel or Google Sheets formula: =SIN(RADIANS(140)) Detailed step by step solution for sin(100)cos(40)-cos(100)sin(40) Solutions Graphing Calculators; New Geometry; Practice; Notebook . Message received. What are Trigonometric functions? Trigonometric functions are defined as the functions which show the relationship between the angle and sides of a right-angled triangle.Solve sin(140) − sin((100)cos(140) − cos(100) Evaluate − sin(140)−sin(100)2 sin(20) sin(120) ≈ −0. cos 140° cos 50° − sin 140° sin 50° This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Тоді sin 0° = 0, cos 0° = 1, tg 0° = 0; sin 180° = 0, cos 180° = -l, tg Determine angle type: 220 > 90°, so it is obtuse. Construction (140) Conversion (268) Ecology (27) Everyday life (257) Finance (558) Food (65) Health (436) Math (656 To find the formula for the projectile range, let's start with the equation of motion. tan 115°; e) E = cot 10° .38742872) ( 0, 1. By standard trig formulae you get. Standard XII. Sign in; Upgrade; Upgrade; Account Details Login Options Account Management Settings Subscription Logout No new notifications For memorising cos 0°, cos 30°, cos 45°, cos 60° and cos 90°. cos 140 ° cos 50 ° − sin 140 ° sin 50 ° what Answered step-by-step. Prove that: (i) cos 3 A + cos 5 A + cos 7 A + cos 15 A = 4 cos 4 A cos 5 A cos 6 A. How to determine the measure of the angles? Angle 1. Magnitude = 7 thetha = -40 degrees, since the x component it negative it will be 40 degrees north of west v= 7(cos(140)i+sin(140)j) (Use a calculator to find the sine and cosine of 140) v= 7(-0. Our results of cos140° have been rounded to five decimal places. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Use a Sum-to-Product Formula to show the following. Jika kita memiliki Sin a dikurangi Sin b.49240387. Utilice nuestra calculadora cos(x) para calcular el valor del coseno de menos 140 grados - cos(140 °) - o el valor de cualquier otro ángulo en grados o en radianes. Thích Trả lời Chia sẻ. The complete trigonometry ratios are sin(220) = -sin(40) and cos(220) = cos(140) and the angles are 40 and 220 degrees. Simplify cos (160)cos (40)+sin (160)sin (40) cos (160) cos (40) + sin(160) sin(40) cos ( 160) cos ( 40) + sin ( 160) sin ( 40) The result can be shown in multiple forms. Find \tan 60\degree tan60° by using 60\degree=2 (30\degree) 60° = 2(30°). Jika tidak direspon, berarti pertanyaan serupa telah ada. . Skip to main content Microsoft Math Solver SolvePracticeDownload SolvePractice Topics Pre-Algebra Mean Mode Arithmetic 699∗ 533 Matrix [ 2 5 3 4][ 2 −1 0 1 3 5] Simultaneous equation {8x + 2y = 46 7x + 3y = 47 Differentiation dxd (x − 5)(3x2 − 2) Integration ∫ 01 xe−x2dx Limits x→−3lim x2 + 2x − 3x2 − 9 Solve your math problems using our free math solver with step-by-step solutions. Using a calculator or reference table, we can find that cos 140° = -0.49240387−0. Tap for more steps Step 1. Determine angle type: 100 > 90°, so it is obtuse sin(100) = 0. I have been stuck for quite some time! Thank you in advance. Soal SPLTV (Sistem Persamaan Linear Tiga Variabel) dan Pembahasan. What is the value of (1/√3 - sin 45°)? 3. To obtain 140 degrees in radian multiply 140° by π / 180° = 7/9 π.3. Tonton video.76604, the same as sin of 50 degrees in radians. Expandir / Contraer.). Write the expression as the sine, cosine, or tangent of an angle.49240387 from 0. Trigonometry Simplify sin (140)cos (50)+cos (140)sin (50) sin(140)cos (50) + cos(140) sin(50) sin ( 140) cos ( 50) + cos ( 140) sin ( 50) The result can be shown in multiple forms. Suggest Corrections. Using Trigonometric Functions Cos 140 Degrees Using Unit Circle To find the value of cos 140 degrees using the unit circle: Rotate 'r' anticlockwise to form 140° angle with the positive x-axis. Mathematics. EDIT: After repeatedly using the double angle sin formula, I got this expression: $\frac{1}{8cos^2(20)cos(40)}$ trigonometry; Find step-by-step Algebra 2 solutions and your answer to the following textbook question: Write the expression as the sine, cosine, or tangent of an angle.6427876063255. Step 2: We can use the identity.1736481. To express the given product as a sum of sines or cosines, we can utilize trigonometric identities.64278761182538 Excel or Google Sheets formula: =SIN(RADIANS(140)) Prove that: (i) cos 55° + cos 65° + cos 175° = 0 (ii) sin 50° − sin 70° + sin 10° = 0 (iii) cos 80° + cos 40° − cos 20° = 0 (iv) cos 20° + cos 100° + cos 140° = 0 (v) sin 5 π 18-cos 4 π 9 = 3 sin π 9 (vi) cos π 12-sin π 12 = 1 2 (vii) sin 80° − cos 70° = cos 50° (viii) sin 51° + cos 81° = cos 21° Also equals 1/cos(θ) sin sin(θ) is the ratio of the opposite side of angle θ to the hypotenuse tangent the straight line that just touches the curve at that point sin(140) cos(140) tan(140) csc(140) sec(140) cot(140) sin(141) cos(141) tan(141) csc(141) sec(141) cot(141) sin(142) cos(142) tan(142) csc(142) sec(142) cot(142) sin(143) cos(143) Nilai dari cos 20+ cos 100+ cos 140adalah. Hitunglah: cos 140 cos 10-sin 140 sin 10. The length of a rectangular picture is 5 inches more than 3 times the width. This means that. ⇒ cos 100° = cos 460° = cos 820°, and so on. cos 30° = sin 60° = √3/2. Therefore, sin (140°)cos (20°) - cos (140°)sin (20°) is √3/2 or Instant Solution: EXPERT VERIFIED. #sin140^@cos50^@+cos140^@sin50^@=sin(140^@+50^@)=sin190^@# Answer link..49240387 0. NCERT Solutions = 2 sin A × cos 45 + cos A × sin 45 = 2 sin A + 45 N o w sin 140 + cos 140 = 2 sin 140 + 45 = 2 sin 185 N o w sin 185 l i e s i n I I I q u d r a n t s o Calculate sin(140)° Determine quadrant: Since 90 140 180 degrees it is located in Quadrant II sin is positive. Note: Since, cosine is an even function, the value of cos (-100°) = cos (100°).6428) of the point of intersection (-0. $$ \sin 140^{\circ} \cos 50^{\circ}+\cos 140^{\circ} \sin 50^{\circ} $$. Also equals 1/cos (θ) You can reuse this answer Creative Commons License.10. Soluciona tus problemas matemáticos con nuestro solucionador matemático gratuito, que incluye soluciones paso a paso.2. Solve.

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(a) sin (140)cos (20°) - cos (140) sin (20°) = (b) sin ("). Cos is the opposite of sin. This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Our results of sin50° have been rounded to five decimal places. To find the value of sin 140 degrees using the unit circle: Rotate ‘r’ anticlockwise to form a 140° angle with the positive x-axis. Best Answer.17364817… - 0. cos 140 ° cos 50 ° − sin 140 ° sin 50 ° what Answered step-by-step. Cek video lainnya. Click the card to flip 👆. Question: In Exercises 23-30, write the expression as the sine, cosine, or tangent of an angle. Користуючись наданими означеннями, дамо означення для будь-якого кута α, 0° < α < 180°. sin A + sin B = 2 sin(A + B 2) cos(A − B 2) sin A + sin B = 2 sin ( A + B 2) cos If you want to find the sine or cosine of any arbitrary angle, you first have to look for its reference angle in the first quarter. By following the instructions provided here, applicants Halo keren untuk mengerjakan soal ini kita harus ingat. . Use nossa calculadora de cos(x) para calcular o valor do cosseno de 140 graus - cos(140 °) - ou de qualquer outro ângulo em graus ou em radianos. . Clique nas setas para abrir os menus! 30 → sin(30°) = 0. ⇒ cos 40° - cos Math.7+20. So, for cos, it will be like. We can do this by using Euler's formula: ejθ = cos(θ) + j sin(θ) e j θ = cos ( θ) + j sin ( θ). . Each of sine and cosine is a function of an angle, which is usually expressed in terms of radians or degrees. So, we have cos (40)cos (50) − sin(40)sin (50) cos ( 40) cos ( 50) - sin ( 40) sin ( 50) Simplify each term. Answer: 1/2 or 0. Jika kita memiliki Sin a dikurangi Sin b. Trig Measurement Calculator. Agregar o Restar Porcentajes 1/2pi → sin(1/2pi rad) = sin((1/2) $$\cos(20)\cos(30)\cos(40)=\frac{\sin(140)+\sin(120)+\sin(100)}4$$ $$\implies\sin(140)+\sin(120)+\sin(100)=4\cos^2(10)\cos(50)$$ I'm not sure where you'd go from there, possibly try to put the RHS into a form where we can apply the identity? Share. Diketahui sin A=5/13 dan cos B=3/5. 8 α 3 − 6 α = 2 cos 300 ∘ = 1 . Artinya, sesuai urutan kuadran, kuadran I( Semua positip), II( hanya Sin postip), III(hanya Tan positip), dan IV (hanya Cos positip) Catatan: Semua langkah- langkah tersebut dirangkum dalam skema diatas. Subtract 0. sin(40°) cos (50°)+cos (40°) sin (50°) 2. Find the value of (tan9° - tan27° - tan63° + tan81°). Tính giá trị đúng của các biểu thức sau (không dùng máy tính cầm tay): a) A = cos 0° + cos 40° + cos 120° + cos 140°; b) B = sin 5° + sin 150° - sin 175° + sin 180°; c) C = cos 15° + cos 35° - sin 75° - sin 55°; d) D = tan 25° .766i+0. defined as one hundredth of the right angle. sin 140 [since, cos 340= cos (360-20) = cos20.com. Sine and cosine are written using functional notation with the abbreviations sin and cos. Join / Login. 0 0. This is equal to π/200 or 9/10°. . Therefore, the expression simplifies to sin (120°). cos 90° = sin 0° = 0. Similar questions. sin(220) = sin(180 + 40) Apply the sine rule. 9. . 88 degrees.49240387. precalculus. Prove that: (i) cos 10° cos 30° cos 50° cos 70° = 3 16 (ii) cos 40° cos 80° cos 160° = -1 8 (iii) sin 20° sin 40° sin 80° = 3 8 (iv) cos 20° cos 40° cos 80° = 1 8 (v) tan 20° tan 40° tan 60° tan 80° = 3 (vi) tan 20° tan 30° tan 40° tan 80° = 1 (vii) sin 10° sin 50° sin 60° sin 70° = 3 16 (viii) sin 20° sin 40° sin 60 (cos 100 + cos 40)/(sin 130 - sin 10) = Rumus Jumlah dan Selisih Sinus, Cosinus, Tangent; Persamaan Trigonometri; TRIGONOMETRI; Selanjutnya ini akan menjadi cos setengah dari 140 yaitu 70 derajat lalu di sini juga ada cos setengah dari 60 yaitu 30 derajat bor di sini ada kos 130 + 10 140 setengahnya adalah 70 derajat di sini ada sin Sin Step 1/8. Sudut-sudut A dan B l Sederhanakan bentuk cos 6theta-cos 2theta. Which of the following is equivalent to cos of 40 degrees? Is it A) negative sin of 40 degrees, B) sin of 40 degrees, C) one over sin of 40 degrees, D) sin of 50 degrees, or E) sin of 140 degrees. step6: conduction identity.17364817 … Hai, Teguh S.Cos½(A+B). . Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more. Berdasarkan konsep di atas didapat: (cos 140°+cos 100°)+ cos 20 Solve your math problems using our free math solver with step-by-step solutions. Guides. Log in Join.cos200∘ is equal to.38742872) Find two points on the line. Solve your math problems using our free math solver with step-by-step solutions. Write the expression as the sine, cosine, or tangent of an angle. cot 30° .0.342. Question . So, sin(140°)cos(20°) - cos(140°)sin(20°) simplifies to sin(140° - 20°). Cite.93969262 … Quadratic equation Trigonometry Linear equation Arithmetic Matrix Simultaneous equation Differentiation Integration Limits Solve your math problems using our free math solver with step-by-step solutions. Gunakan istilah"Semua Sudah Tau Caranya". Jawaban soal ini adalah terbukti bahwa cos 140°+cos 100°+ cos 20°=0 Ingat konsep: 1.6428) of unit circle and r.1736481757029 Excel or Google Sheets formula: =COS(RADIANS(100)) - Bentuk pertanyaan cos 140 derajat - cos 100 derajat_____sin 140 derajat - sin 100 derajatmohon bantuannya:) - Lihat pembahasan Now we need to find the values of sin(140°) and cos(140°). therefore sin(A-B) = sin(110°-20°)= sin (90°)=1 But if you insist on using the cosine sum or difference identity, you can first convert the expression to match with the 12/05/2022 8,531. Maka akan = 2 dikali cos setengah a + b * Sin setengah A min b kemudian jika kita memiliki a dikurangi cos b maka akan = min 2 dikali Sin setengah a + b dikali Sin setengah A min b pada soal ini kita diminta untuk mencari nilai dari sin 80 derajat dikurangi Sin 40 … 最も基本的な関数は正弦関数(サイン、sine)と余弦関数(コサイン、cosine)である。これらは sin(θ), cos(θ) または括弧を略して sin θ, cos θ と記述される( θ は対象となる角の大きさ)。 Watch in App. Himpunan penyelesaian dari sin x = -1/2 akar(2) dengan 0< Study with Quizlet and memorize flashcards containing terms like Sin 0, cos 0, tan 0, Sin 10, cos 10, tan 10, sin20, cos 20, tan 20 and more. Fluktuasi panen madu dari perusahaan tersebut bersesuaian dengan fungsi F(t)=3cos (π/3 t)+13cos (π/6 t)+36 (dalam liter) dengan t waktu (bulan) dan 1≤ t ≤12. Jonathan and his sister Jennifer have a combined age of 48. Jawaban terverifikasi. cos (5) cos ( 75) - sin (7) sin (5) II x Write the expression as the sine, cosine, or tangent of an angle. EDIT: After repeatedly using the double angle sin formula, I got this expression: $\frac{1}{8cos^2(20)cos(40)}$ trigonometry; Find step-by-step Algebra 2 solutions and your answer to the following textbook question: Write the expression as the sine, cosine, or tangent of an angle. Now the square of your expression is. .=cos (x)cos (y)+sin (x)sin (y) Choose a justification for each step in the derivation of the sine difference identity. Beneath each formula is shown a spherical triangle in which the four elements contained in the formula are highlighted. Prove that cos 4 5 o cos 1 5 o − sin 4 5 o sin Using the cosine sum identity and the values of sine and cosine at known angles, we can determine that the value is -√3/2. Prove that cos 1 3 0 o cos 4 0 o + sin 1 3 0 o sin 4 0 o = 0. Given a point P in the plane with Cartesian coordinates ( x, y) and polar coordinates ( r, θ), the following conversion formulas hold true: x = r cos θ and y = r sin θ, (7. The value of tan70° tan20° + sin280° + sin2 10° is Question 454762: Please simplify each trigonometric expression: 1.. cos 112° cos 45° + sin 112° sin 45° Found 2 solutions by ikleyn, MathTherapy: Answer by ikleyn(49693) (Show Source): You can put this solution on YOUR website!. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework Answered: Find the product z1z2 and the quotient… | bartleby.2 . 1 trả lời. Tunjukkan bahwa tan x = 3^ Nilai dari -8 sin 105 cos 15 adalah . Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site Diketahui cos (x-30) = sin x . z1 = 5/6 (cos (40°) + i sin (40°)), z2 = 1/6 (cos (140°) + i sin (140°)) Find the product z1z2 and the quotient z1/z2. And for tangent and cotangent, only a half a revolution will result in the same outputs. Hitunglah: cos 140 cos 10-sin 140 sin 10.1736, and cos 70° = 0. Halo Shalma, kakak bantu ya. In your problem A=110° and B=20°.50^2) v^2=28. sin (1400) - sin (100°) = -sin (200) Use a Sum-to-Product Formula for Sine and simplify. . Question 1018132: Write the expression as the sine, cosine, or tangent of an angle. Bunga Tunggal dan Bunga Majemuk. Precalculus questions and answers. Jawaban terverifikasi. Detailed step by step solution for sin(140)cos(20)-cos(140)sin(20) Math. Determine angle type: 140 > 90°, so it is obtuse sin(140) = 0.766, 0. cos 140° cos 50° − sin 140° sin 50°. The sin of 140 degrees equals the y-coordinate(0. cos 140° cos 50° - sin 140° sin 50°. Rumus Jumlah dan Selisih Sinus, Cosinus, Tangent; Persamaan Trigonometri; TRIGONOMETRI; Matematika. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more. Here's the best way to solve it.91:21 ta 7102 ,31 rpA detide wolloF . Then you can find the trigonometric function of the reference angle and choose a proper sign. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site Diketahui cos (x-30) = sin x . Since cosine function is negative in the second quadrant, thus cos 140° value = -0. Note: Since, cosine is an even function, the value of cos (-100°) = cos (100°). Groups Cheat Sheets.17364817 …. We have been given an expression in terms of cos and five solutions in terms of sin. . Q 4. To obtain 50 degrees in radian multiply 50° by π / 180° = 5/18 π. cos 60° = 1/2 Dari soal akan dibuktikan bahwa cos 140°+cos 100°+ cos 20°=0. Graph cos(40)cos(10)+sin(40)sin(10) Step 1. Therefore, the expression simplifies to sin Instant Solution: EXPERT VERIFIED. The signs of the trigonometric functions are cos(-100) = negative and tan(-100) = positive. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more. Diketahui sin A=5/13 dan cos B=3/5. Standard XII Physics. 0. Math Calculus Find the product z1z2 and the quotient z1/z2. Soluciona tus problemas matemáticos con nuestro solucionador matemático gratuito, que incluye soluciones paso a paso. Last updated on Jul 10, 2023 The National Institute of Technology released the results of the NIT MCA Common Entrance Test 2022 or NIMCET. tan 45° . Sign of Trigonometric Ratios in Different Quadrants. (cos 220°+ cos 100°)÷ (sin 140°+ sin 100°) For cos 100 degrees, the angle 100° lies between 90° and 180° (Second Quadrant ). Special Angles - 30°, 45°, 60°. Now we substitute these values back into the equation: sin(140° - 20°) = sin(40°)cos(20°) - (-cos(40°))sin(20°) Simplifying further: sin(120°) = sin(40°)cos(20°) + cos(40°)sin(20°) Now we use the sine of a … The exact value of the given trigonometric function sin(140°)cos(20°) – cos(140°)sin(20°) is -√3/2. Nyatakan setiap bentuk berikut sebagai selisih sinus. To express the given product as a sum of sines or cosines, we can utilize trigonometric identities. Berdasarkan konsep di atas didapat: (cos 140°+cos 100°)+ cos 20 Solve your math problems using our free math solver with step-by-step solutions. Find step-by-step Precalculus solutions and your answer to the following textbook question: Write the expression as the sine, cosine, or tangent of an angle. Tính giá trị biểu thức: A = sin^2 20° + sin^2 100° + sin^2 140°. Sudut-sudut A dan B l Sederhanakan bentuk cos 6theta-cos 2theta. Step 1: We are given the equation. Find \tan 60\degree tan60° by using 60\degree=2 (30\degree) 60° = 2(30°). This problem involves using a trigonometric identity.642787609. Explanation: For cos 100 degrees, the angle 100° lies between 90° and 180° (Second Quadrant ). (iv) sin 3 + sin 2 = 4 sin 2 cos 3 A 2 (v) cos 20° cos 100° + cos 100° cos 140° − 140° cos 200° = − 3 4 (vi) 2 θ. Exact Form: sin(140)cos(50)+cos(140)sin(50) sin ( 140) cos ( 50) + cos ( 140) sin ( 50) Decimal Form: −0. cos x + cos y = 2cos ( (x+y)/2). Use the slope-intercept form to find the slope and y-intercept. Aturan Penjumlahan dan Aturan Perkalian. Step-by-step explanation: cos 340 . The cos of 140 degrees is -0. Now we substitute these values back into the equation: sin Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site cos 140° = -0. Our math solver … Arithmetic 699∗ 533 Matrix [ 2 5 3 4][ 2 −1 0 1 3 5] Simultaneous equation {8x + 2y = 46 7x + 3y = 47 Differentiation dxd (x − 5)(3x2 − 2) Integration ∫ 01 xe−x2dx Limits x→−3lim x2 + … Solve your math problems using our free math solver with step-by-step solutions. sin2 (20) + cos2 (20) sin 2 ( 20) + cos 2 ( 20) Apply pythagorean identity. To find sin(140°), we can use the sine of a supplementary angle: sin(140°) = sin(180° - 140°) = sin(40°).71312301 Quiz Trigonometry sin(140)−sin((100)cos(140)−cos(100) Share Examples Quadratic equation x2 − 4x − 5 = 0 Trigonometry 4sinθ cosθ = 2sinθ Linear equation y = 3x + 4 Arithmetic 699 ∗533 Matrix [ 2 5 3 4][ 2 −1 0 1 3 5] Simultaneous equation Carilah nilai dari: (cos 140-cos 100)/ (sin 140-sin 100) Rumus Jumlah dan Selisih Sinus, Cosinus, Tangent Persamaan Trigonometri TRIGONOMETRI Matematika Pertanyaan lainnya untuk Rumus Jumlah dan Selisih Sinus, Cosinus, Tangent Nilai dari (sin A+cos A)^2+ (sin A-cos A)^2= . Often, if the argument is simple enough, the function value will be written without parentheses, as sin θ rather than as sin(θ). Exact Form: cos(140)cos(20)−sin(140)sin(20) cos ( 140) cos ( 20) - sin ( 140) sin ( 20) Decimal Form: −0. Cek video lainnya. Selesaikan persamaan diferensial berikut : y =cos^2 (2x + 3) - sin^2 (3x + 1) 37.Sin½(A+B). Dia -cos(90° + 140°) = -cos 230° Sin 140 Degrees Using Unit Circle. For the four trigonometric functions, sine, cosine, cosecant and secant, a revolution of one circle, or 2π, 2 π, will result in the same outputs for these functions. Evaluate: cos 20 ∘ cos 100 ∘ + cos 100 ∘ cos 140 ∘ − cos 140 ∘ cos 200 ∘ cos20∘cos100∘+cos100∘cos140∘−cos140∘.

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98480775335852 Excel or Google Sheets formula: =SIN(RADIANS(100)) Prove that:i cos 55∘+cos 65∘+cos 175∘=0ii sin 50∘ sin 70∘+sin 10∘=0iii cos 80∘+cos 40∘ cos 20∘=0iv cos 20∘+cos 100∘+cos 140∘=0v sin5 π/18 cos4 π/9=√3sinπ/9vi cosπ/12 sinπ/12=1/√2vii sin 80∘ cos 70∘=cos 50∘viii sin 51∘ cos 81∘=cos 21∘ The value of the expression cos 20 ∘ cos 100 ∘ + cos 100 ∘ cos 140 ∘ − cos 140 ∘ cos 200 ∘ is Q. $\sin 140^{\circ} \cos 50^{\circ}+\cos 140^{\circ} \sin 50^{\circ}$.49240387 0. tan 45° . Menentukan tanda (-/+) nilai sin cos dan tan.sin50°. Trig Tables - Some Exact Values and A Numerical Table. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. Calculus.76604.. Mapa del Sitio. To find the exact value of sin (120°), we know that sin (120°) is √3/2 or approximately 0. So, sin (140°)cos (20°) - cos (140°)sin (20°) simplifies to sin (140° - 20°). Nuestro solucionador matemático admite matemáticas básicas, pre-álgebra, álgebra, trigonometría, cálculo y mucho más.98480…..5 - 0.71312301 Quiz Trigonometry sin(140)−sin((100)cos(140)−cos(100) Share … Carilah nilai dari: (cos 140-cos 100)/ (sin 140-sin 100) Rumus Jumlah dan Selisih Sinus, Cosinus, Tangent Persamaan Trigonometri TRIGONOMETRI Matematika … Free math problem solver answers your trigonometry homework questions with step-by-step explanations. Free math problem solver answers your algebra Знаходження значень синуса, косинуса і тангенса тупих кутів. The sine formula: sina sinA = sinb sinB( = sinc sinC) FIGURE III. By following the instructions provided here, … Simplify sin (140)cos (50)+cos (140)sin (50) sin(140)cos (50) + cos(140) sin(50) sin ( 140) cos ( 50) + cos ( 140) sin ( 50) The result can be shown in multiple forms.8) These formulas can be used to convert from rectangular to polar or from polar to rectangular coordinates. Solved by verified expert. Step 1/4. cos 130∘cos 40∘+sin 130∘sin 40∘ is equal to. 2 c $$\frac{\sin^2(20)}{\sin(140)\sin(80)} = \frac{\cos(80)}{\cos(20)}$$ Any help or hints will be appreciated.1736481. Conversor-de-Medidas.. cos ( (x-y)/2) 2. Trigonometry Subtract cos (140)cos (20)-sin (140)sin (20) cos (140) cos (20) − sin(140) sin(20) cos ( 140) cos ( 20) - sin ( 140) sin ( 20) The result can be shown in multiple … Quadratic equation Trigonometry Linear equation Arithmetic Matrix Simultaneous equation Differentiation Integration Limits Solve your math problems using our free math … Using Trigonometric Functions Cos 140 Degrees Using Unit Circle To find the value of cos 140 degrees using the unit circle: Rotate ‘r’ anticlockwise to form 140° angle with the … Math. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. cos(140) = -√(1-sin(140) 2) = -√(1-p 2) Cosine is negative in the 2nd quadrant. cos 60° = 1/2 Dari soal akan dibuktikan bahwa cos 140°+cos 100°+ cos 20°=0.0- = )022( nis . Find the Exact Value sin (20)^2+cos (20)^2. The four formulas may be referred to as the sine formula, the cosine formula, the polar cosine formula, and the cotangent formula. Determine the values of the indicated functions in the given manner. sin10∘ + sin20∘ + sin40∘ + sin50∘ = sin70∘ + sin80∘ sin 10 ∘ + sin 20 ∘ + sin 40 ∘ + sin 50 ∘ = sin 70 ∘ + sin 80 ∘.76604, the same as cos of 140 degrees in radians. Sin 50degrees = sin (5/18 × π).Except where explicitly stated otherwise, this article assumes Other Questions. Cos 140degrees = cos (7/9 × π). Nilai dari (sin 140-sin 100)/ (cos 140-cos 100) adalah Rumus Jumlah dan Selisih Sinus, Cosinus, Tangent Persamaan Trigonometri TRIGONOMETRI Matematika Pertanyaan lainnya untuk Rumus Jumlah dan Selisih Sinus, Cosinus, Tangent Nilai dari sin 120 cos 45- cos 120 sin 45 adalah .766, 0.76604. Tonton video Nilai dari cos 105-cos 15 adalah Tonton video The value of cos (140)cos (50)-sin (140)sin (50) is -0. Loga Sinh Học lớp 12.44346 . Contoh, akan ditentukan nilai Sin 150. Maka akan = 2 dikali cos setengah a + b * Sin setengah A min b kemudian jika kita memiliki a dikurangi cos b maka akan = min 2 dikali Sin setengah a + b dikali Sin setengah A min b pada soal ini kita diminta untuk mencari nilai dari sin 80 derajat dikurangi Sin 40 derajat dibagi dengan cos 140 最も基本的な関数は正弦関数(サイン、sine)と余弦関数(コサイン、cosine)である。これらは sin(θ), cos(θ) または括弧を略して sin θ, cos θ と記述される( θ は対象となる角の大きさ)。 The correct option is A0cos (x - y) = cosx cosy + sinx sinyHere, x = 130°, y = 40°So, cos (130°- 40° ) = cos90° = 0.405331191 (sin (10)+sin (20)+sin (40)+sin (50))/ (cos (10)+cos (20)+cos (40)+cos (50)) You need to punch in each term in a calculator, sum up the numerator and denominator separately, then divide the two sums. Share on Whatsapp Latest NIMCET Updates. Trigonometry Subtract cos (140)cos (20)-sin (140)sin (20) cos (140) cos (20) − sin(140) sin(20) cos ( 140) cos ( 20) - sin ( 140) sin ( 20) The result can be shown in multiple forms. the length of the hypotenuse divided by the length of the adjacent side. View Solution.In this case, we can use the identity sin(a) sin(b) = (1/2) [cos(a-b) - cos(a+b)].5; pi Prove that:(i) cos 55° + cos 65° + cos 175° = 0(ii) sin 50° − sin 70° + sin 10° = 0(iii) cos 80° + cos 40° − cos 20° = 0(iv) cos 20° + cos 100° + cos 140° = 0(v) π π π π π π sin 5 π 18 - cos 4 π 9 = 3 sin π 9(vi) π π π π cos π 12 - sin π 12 = 1 2(vii) sin 80° − cos 70° = cos 50°(viii) sin 51° + cos 81 Trigonometry. If you want cosine 140° with higher accuracy -sin140° = cos (90°+140°) = cos 230° = sin (180°+140°) = sin 320° Note that sin140° is periodic: sin (140° + n × 360°) = sin 140 degrees, n ∈ Z. cos (180°-x ) = -cos x 3. (7. a) First, we need to convert the cosine functions into phasor form. cos 60° = sin 30° = 1/2. Expert Help. Sin 140 degrees can also be expressed using the equivalent of the given angle (140 degrees) in radians (2.. We know that 140° - 20° equals 120°. Step 2/8.6428) of unit circle and r.36)^2+(4. Tonton video Free math problem solver answers your trigonometry homework questions with step-by-step explanations.76604. Answer to cos 140 ° cos 50 ° − sin 140 ° sin 50 ° what AI Homework Help. Explanation: To find the value of cos 140° + sin 10° + √3cos 70°, we can use the trigonometric identities and values for these angles. Solution. sin(40)=sin(180-40) or sin(40) = sin(140) = p . verified. Exact Form: cos(160)cos(40)+sin(160)sin(40) cos ( 160) cos ( 40) + sin ( 160) sin ( 40) Decimal Form: −0. -6. . cos(-100) and tan(-100) The cosine trigonometric expression is an even function.5.5. cos 105º cos 15º - sin 105º sin 15º Answer by stanbon(75887) (Show Source): Jawaban paling sesuai dengan pertanyaan Nilai dari (cos 140^(@)-cos 100^(@))/(sin 140^(@)-sin 100^(@))=. Halo Shalma, kakak bantu ya. sin A - sin B = 2 cos \(\rm\frac{A+B}{2}\) cos 20° + cos 100° + cos 140° = 0. Use app Login. Since cosine function is negative in the second quadrant, thus cos 100° value = -0. Calculadoras. 25th qurstion 25 What sign has sin A + cosA for the following value of A â ‹ 1) 1400 2)â ‹ 2780 3)â ‹ -3560 - Maths - Trigonometric Functions. We can do this by using Euler's formula: ejθ = cos(θ) + j sin(θ) e j θ = cos ( θ) + j sin ( θ).. The exact value of sin 140° cos 20° - cos 140° sin 20° is: √2/2 √3/2 Not listed -√2/2. by Maths experts to help you in doubts & scoring excellent marks in Class 11 exams.49240387 0. . tan 115°; e) E = cot 10 The value of the expression cos20∘cos100∘ +cos100∘cos140∘ −cos140∘cos200∘ is. The projectile range is the distance traveled by the object when it returns to the ground (so y = 0): 0 = V₀ × t × sin (α) - g × t²/2.8660. Note: Since, cosine is an even function, the value of cos (-140°) = cos (140°). precalculus. Question. Porcentaje. Step 1: Write the given information w1 = 20 (cos (140) + i sin (140)) W2 = 4 (cos (35) + i sin (35)) Step 2: [tex]\begin {gathered} \frac {w_1} {w_2} \\ =\frac {20…. Nuestro solucionador matemático admite matemáticas básicas, pre-álgebra, álgebra, trigonometría, cálculo y mucho más.50j (This is the component form) To find the magnitude, use the Pythagorean theorem v^2=(-5. Download Solution PDF.. Medium. From that equation, we'll find t, which is the time of flight to the ground: t = 2 × V₀ × sin (α)/g. Expert Help. Exact Form: sin(140)cos(50)+cos(140)sin(50) sin ( 140) cos ( 50) + cos ( 140) sin ( 50) Decimal Form: −0.)°02(nis)°041(soc - )°02(soc)°041(nis fo eulav tcaxe eht dniF ,:7 petS :6 petS :5 petS 1- tuo gnirotcaF :4 petS ytreporp evitaicossA :3 petS ytreporp evitubirtsiD :2 petS :1 petS .766, sin 10° = 0.In this case, we can use the identity sin(a) sin(b) = (1/2) [cos(a-b) - cos(a+b)]. sin 110° cos 80° +cos 110° sin 80 tan 325°-tan 86 1 + tan 325° tan 86. How to determine the signs of the trigonometric functions? The trigonometric expressions are given as. The specific identity used here is the difference of angles identity, which states that sin(a - b) = sin(a)cos(b) - cos(a)sin(b). cos 140° cos 50° − sin 140° sin 50°. Solve cos140-cos100/sin140^circ-sin100^circ= | Microsoft Math Solver Solve your math problems using our free math solver with step-by-step solutions. $\sin 140^{\circ} \cos 50^{\circ}+\cos 140^{\circ} \sin 50^{\circ}$. Rumus pengurangan sinus dan kosinus adalah sebagai berikut : Sin A - Sin B = 2. cos 0° = sin 90° = 1. Jawabannya adalah √3.76604.3 (Combine Solve sin(140) − sin((100)cos(140) − cos(100) Evaluate − sin(140)−sin(100)2 sin(20) sin(120) ≈ −0. sin 200 = sin (180+20) = -sin20 3. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies. . Tonton video. cos ( (x-y)/2) 2. Tonton video. What is the Value of Sin 140 Degrees? The value of sin 140 degrees in decimal is 0.. cos 140 degrees = -0. Convert from Degrees to Radians. cos(-x) = cos(x) In this case, x = 100. Jawaban soal ini adalah terbukti bahwa cos 140°+cos 100°+ cos 20°=0 Ingat konsep: 1. We should learn it like. Hai cover n jika menemukan soal seperti ini langkah pertama yang harus dilakukan dalam mengerti pertanyaannya nilai dari cos 140 derajat + cos 100 derajat + cos 20 derajat adalah bagaimana cara mengerjakannya kita harus masukkan ke dalam satu rumus ya. Trigonometry is a branch of mathematics concerned with relationships between angles and ratios of lengths. The sin of 50 degrees is 0. Introduction. We know that 140° - 20° equals 120°. cos x + cos y = 2cos ( (x+y)/2). Click here:point_up_2:to get an answer to your question :writing_hand:sin 20 circ sin 140 circ sin 100 circ. Open in App.76604. (i) cos 55° + cos 65° + cos 175° = 0 (ii) sin 50° − sin 70° + sin 10° = 0 (iii) cos 80° + cos 40° − cos 20° = 0 (iv) cos 20° + cos 100 How do you write the expression #sin140^circcos50^circ+cos140^circsin50^circ# as the sine, cosine, or tangent of an angle? Trigonometry Trigonometric Identities and Equations Sum and Difference Identities. . Explanation: For cos 140 degrees, the angle 140° lies between 90° and 180° (Second Quadrant ). arcsin (- ( square root of 2)/2) arcsin(− √2 2) arcsin ( - 2 2) 100. Find the product z_1z_2 z1z2, where : z_1=3 (\cos {20\degree}+i\sin {20\degree}) \text { and }z_2=4 (\cos {220\degree}+i\sin {220\degree}) z1 = 3(cos20°+isin20°) and z2 = 4(cos220 Bài 4 trang 71 Toán lớp 10 Tập 1: Tính giá trị đúng của các biểu thức sau (không dùng máy tính cầm tay): a) A = cos 0° + cos 40° + cos 120° + cos 140°; b) B = sin 5° + sin 150° - sin 175° + sin 180°; c) C = cos 15° + cos 35° - sin 75° - sin 55°; d) D = tan 25° . Share on Whatsapp Latest NIMCET Updates. Tunjukkan bahwa: -1+csc^2 45= cot^2 45. Solve the numerator, ⇒ cos 40° - cos140° = - 2 sin [ (140° + 40°)/2] × sin [ (40° - 140°)/2] ( ∴ cos A − cos B = − 2 sin (A + B)/2 sin (A−B)/2) ⇒ cos 40° - cos140° = 2 sin [ (140° + 40°)/2] × sin [ (140° - 40°)/2] ⇒ cos 40° - cos 140° = 2sin90°. tan(140) = sin(140 Write the expression as the sine, cosine, or tangent of an angle. Since cosine function is negative in the second quadrant, thus cos 100° value = -0. For the first cosine function, we have: 100 cos(300t +45∘) = 100cos(300t) cos(45∘) − sin(300t) sin(45∘) 100 cos ( 300 t To find cos(140°), we can use the cosine of a supplementary angle: cos(140°) = -cos(180° - 140°) = -cos(40°). Tonton video sin 6x=. Calculus questions and answers. Tunjukkan bahwa tan x = 3^ Nilai dari -8 sin 105 cos 15 adalah . >> Prove that cos 130^ocos 40^o + sin 130^o. a) First, we need to convert the cosine functions into phasor form. Hai cover n jika menemukan soal seperti ini langkah pertama yang harus dilakukan dalam mengerti pertanyaannya nilai dari cos 140 derajat + cos 100 derajat + cos 20 derajat adalah bagaimana cara mengerjakannya kita harus masukkan ke dalam satu rumus ya. 0 lượt thích 36 xem. Tunjukkan bahwa: sin^2 60 + cos^2 60 = 1. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more. There are more formulas for the double angle (2 × 140°), half angle ( (140/2)°) as well as the sum, difference and products of two angles such as 140° and β. sin(220) Expand the above expression. Solve any question of Trigonometric Functions with:-Patterns of problems > Was this answer helpful? 0. If Jonathan is twice as old as Pernyataan berikut ini yang benar adalah (A) sin90°+sin20°=2sin110°cos70° (B) sin100°−sin30°=2cos70°sin80° (C) cos100°+cos160°=−2cos130°cos60° (D) sin100°−sin20°=2sin120°cos80° (a) cos120°−cos160°=2si Step by step video & image solution for Prove that : cos 130^@ cos 40^@+ sin 130^@ sin 40^@= 0. sin 50° = 0. Step 1. ⇒ 1 4 (2 cos 80 o sin 140 o + sin 140 o) The value of cos 140° + sin 10° + √3cos 70° is approximately 0. (ii) cos A + cos 3 A + cos 5 A + cos 7 A = 4 cos A cos 2 A cos 4 A., Find the exact value of cos(5 pi/6) cos (pi/12) + sin (5 Calculate cos(100)° Determine quadrant: Since 90 100 180 degrees it is located in Quadrant II sin is positive. ⇒ cos 100° = cos 460° = cos 820°, and so on. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. tan 45° . Tap for more steps Slope: 0 0 y-intercept: (0,1. Find step-by-step College algebra solutions and your answer to the following textbook question: Use an addition or subtraction formula to find the exact value of: $$ \sin 140^{\circ} \cos 20^{\circ}-\cos 140^{\circ} \sin 20^{\circ} $$.