2 years ago

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

2 answers:

8 0

Hello :
sin<span>θ = 15/17
</span> 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

kipiarov [429]2 years ago

4 0

Answer:

Cosine (theta) = plus or minus 8/17

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