Question

express cos x as a fraction in simplest terms.

Explanation:

Step1: Recall cosine - ratio formula

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

Step2: Identify adjacent and hypotenuse

For angle $X$, the adjacent side to angle $X$ is $xw = 3$ and the hypotenuse is $xv=5$.

Step3: Calculate $\cos X$

$\cos X=\frac{3}{5}$

Answer:

$\frac{3}{5}$