Question

Express cos K as a fraction in simplest terms.

9
M
15
Answer: cos K=
K
Submit Answer

Answer 1

4/5

Explanation:

In a right triangle such as this one

cos (angle) = adjacent leg / hypotenuse

cos(k) = KL / 15

You will need to find the leg length KL using Pythagorean Theorem

15^2 = 9^2 + (KL)^2 KL = 12

then cos k = 12/15 = 4/5