Question

what is cos a? cos a = 8/?

Explanation:

Step1: Recall cosine - ratio definition

In a right - triangle, $\cos\theta=\frac{\text{adjacent}}{\text{hypotenuse}}$. For angle $A$, the adjacent side to angle $A$ is 8 and the hypotenuse is 9.

Step2: Write the cosine value

$\cos A=\frac{8}{9}$

Answer:

$\frac{8}{9}$