If sin 0 = 15/17 use pythagorean identity to find cos 0

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asked Jul 24, 2018 166k views

2 Answers

Inessa · Answer 1 · 2018-07-29T07:35:38+0000

hello :
sinθ = 15/17
use pythagorean identity : cos²θ +sin² θ = 1
cos²θ = 1 - sin² θ
cos²θ = 1-(15/17)²
cos²θ = 1- 225/289
cos²θ = 64/289
cos²θ = (8/17)²
cosθ = 8/17 or -8/17

If sin 0 = 15/17 use pythagorean identity to find cos 0

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