Find sin 2 theta, cos theta = 5/13, theta lies in quadrant IV.

Garrett Sheppard

Garrett Sheppard

Answered question

2022-08-05

Find sin 2 θ , cos θ = 5 / 13 , θ lies in quadrant IV.

Answer & Explanation

Makai Lang

Makai Lang

Beginner2022-08-06Added 11 answers

sin 2 x = 2 sin x cos x
cos x = 5 / 13 sin x = 12 / 13, cuz 5,12 and 13 is the rightangle triangle..
since x is in 4th quadrant, sin is -ve there and cos is+ve
so ans = 2*5*-12/169

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