Question

What is the ratio cos C?

Answer 1

8/17

Explanation:

17² = 15² + adjacent²

adjacent² = 64

adjacent = 8

Cos C = adjacent/hypotenuse

= 8/17

Answer 2

Roughly, sinC = 15/17

=> AB = 15, BC = 17 => AC = sqrt(17^2-15^2) = 8

=> cos C = AC/BC = 8/17