# Find the value of sin3a in terms of sina

## plz help 4 these Trigonometry exercises? Yahoo Answers If tan 3a / tan a = k what is the value of sin 3a / sin a. Kerala Plus One Maths Chapter Wise Questions and Answers Chapter 3 Trigonometric Functions Short Answer Type Questions (Score 3) Question 1. In a triangle ABC, a = 4, c = 12, and c = 60В°, then find the value of sin A. Answer: Question 2. Let angle x lie in III rd quadrant i. Complete the following [вЂ¦], Kerala Plus One Maths Chapter Wise Questions and Answers Chapter 3 Trigonometric Functions Short Answer Type Questions (Score 3) Question 1. In a triangle ABC, a = 4, c = 12, and c = 60В°, then find the value of sin A. Answer: Question 2. Let angle x lie in III rd quadrant i. Complete the following [вЂ¦].

### How To Derive The Formula For Sin3A Maths Trigonometry

plz help 4 these Trigonometry exercises? Yahoo Answers. Given that $\frac{\tan 3a}{\tan a}=k$ Method 1: $\frac{\sin 3a}{\sin a}$ $=\frac{\sin 3a\cos a}{\sin a\cos a}$ [math]=\frac{2\sin 3a, 12. Using 60 degrees as a unit angle, find values for the cosines of 120 and 180 degrees. 13. Using 90 degrees as a unit angle, find values for the cosines of 180 and 270 degrees. 14. Using the tangent formulas for multiple angles and the tables, find the tangents for three times 29, 31, 59, and 61 degrees..

Back in the 'good ol' days' we had to memorize or have at hand many trig identities. One of them was the expansion sin(3A) =3sinA - 4 sin^3 A , which Steve actually developed for you. 16.05.2009В В· Upload failed. Please upload a file larger than 100x100 pixels; We are experiencing some problems, please try again. You can only upload files of type PNG, JPG, or JPEG.

If tan 3a is equal to sin cos 45 plus sin 30, then the value of a = 0.4. 16.05.2009В В· Upload failed. Please upload a file larger than 100x100 pixels; We are experiencing some problems, please try again. You can only upload files of type PNG, JPG, or JPEG.

### (Sin3A +cos3A )+(sinA cosA )(sinA+cosA )/sinA If sinA+sin2A=1then what is the value of cos2a+cos4A. 12.10.2018В В· To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW sin3A+sin2A-sinA is, How do you find the exact value of #sin 84# using the sum and difference, double angle or half angle formulas?. ### (Sin3A +cos3A )+(sinA cosA )(sinA+cosA )/sinA Tables of Mathematical Formulas analyzemath.com. FORMULA SHEET MATH 1060-004 Trigonometry The following formulas will be provided on the Final Test. Sum and Difference Formula sin(A+ B) = sin AcosB+cos AsinB FIND THE REMAINDER: 2x^2-y^2+xy+3y+5 Г· 2x-y+1Explain the process; What is the literary value of the story "The Tell-Tale Heart" by Edgar Allan Poe? What actions вЂ¦. 1 Expert Answer(s) - 108585 - If sinA+sin^2A+sin^3A=1, prove that cos^6A-4cos^4A+8cos^2A=4 . Answer this question and win exciting prizes (Original post by davros) Write sin2A as 2sinAcosA in the 1st term which will give you a factor of Cos^2A which you can rewrite in terms of sinA Write cos2A = cos^2A - sin^2A in the 2nd term, which you can then rewrite solely in terms of sinA. Then plug in the value of sinA you are given

if sinx=7/5 and angle x is in quadrant 2 and cos y=12/13 and angle y is in quadrant 1 find sin (x+y) asked Nov 26, 2013 in TRIGONOMETRY by harvy0496 Apprentice double-angle 07.03.2010В В· What is the maximum value of sinA x cosA ? We were asked this question in a test, i had written 1/2 but my sister says its 1. Please tell me what is the answer . And how ? thnx if cosa +2cosb +3cosc = sina + 2sinb + 3sinc = 0 then find the value of sin3a + 8sin3b +27sin3c - Math - Click here рџ‘† to get an answer to your question пёЏ find the value of tan A - sinA /sin3A

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