Use a unit circle diagram to find:

MATHEMATICS · Multi-part · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

Use a unit circle diagram to find: (1) a**

\cos \frac{3\pi}{2}

and

\sin \frac{3\pi}{2}

(2) b

\cos(-\frac{\pi}{2})

and

\sin(-\frac{\pi}{2})