Answer
$\frac{1}{2}.$
Work Step by Step
$g(-\theta)=cos(-60^{O})=cos\frac{-\pi}{3}=\frac{1}{2}.$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 6 - Trigonometric Functions - 6.2 Trigonometric Functions: Unit Circle Approach - 6.2 Assess Your Understanding - Page 379: 106
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