Question

question 21 of 25 what is cos 28°? a. 15/17 b. 15/8 c. 8/17 d. 8/15

Explanation:

Step1: Recall cosine definition

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

Step2: Identify sides for $\theta = 28^{\circ}$

For the $28^{\circ}$ angle, the adjacent side is 15 and the hypotenuse is 17.

Step3: Calculate $\cos28^{\circ}$

$\cos28^{\circ}=\frac{15}{17}$

Answer:

A. $\frac{15}{17}$