Question

question 2
evaluate $cos 90^{\circ}$.
$\frac{\sqrt{3}}{2}$
0
-1
1

Explanation:

Step1: Recall cosine of 90 degrees

From the unit circle or trigonometric values, $\cos 90^\circ$ corresponds to the x-coordinate of the point on the unit circle at 90 degrees, which is 0.

Answer:

0 (Option: 0)