3 years ago

Please help with this question

Mathematics

1 answer:

Butoxors [25]3 years ago

8 0

Answer:

15/17

Step-by-step explanation:

You can use what is called the Pythagorean identity:

sin(θ)² + cos(θ)² = 1

(-8/17)² + cos(θ)² = 1

cos(θ)² = 1 - 64/289 = 225/289

cos(θ) = √(225/289)

cos(θ) = 15/17 . . . . . . . cosine is positive in the 4th quadrant

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