Question

Which is equal to sin 90°?

a. tan 90 degrees
b. cos 90 degrees
c. sin 0 degrees
D. cos 0°

Answer 1

D. cos 0°

Explanation:

`\because \: \cos \: 0 \degree = 1 \\ and \: \sin 90 \degree = 1 \\ \\ \therefore \: \cos \: 0 \degree =\sin 90 \degree`