Question

what is cos a?
cos a = \frac{?}{}

Explanation:

Step1: Recall the cosine formula

In a right - triangle, $\cos\theta=\frac{\text{adjacent}}{\text{hypotenuse}}$.

Step2: Identify the adjacent side and hypotenuse for angle \(A\)

For angle \(A\), the adjacent side is \(8\) and the hypotenuse is \(17\).

Answer:

$\frac{8}{17}$