Question

Find cos 0.

A. 12/20
B. 12/16
C. 16/20
D.16/12

Answer 1

A.

Explanation:

remember, sine is the up/down distance from the center of the surrounding circle. cosine is the left/right sustenance from the center.

and for a triangle/circle different than the norm circle with radius = 1, we need to multiply all functions by the actual radius.

so, in this triangle

12 = cos(theta) × 20

cos(theta) = 12/20