Question

find the missing side. enter the known side. remember: sohcahtoa

Explanation:

Step1: Recall cosine formula

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

Step2: Identify sides

For the given angle of $28^{\circ}$, the adjacent side is $15$ and the hypotenuse is $z$.

Answer:

$15$