Answer
$\frac{1}{4}.$
Work Step by Step
$[g(\theta)]^2=[cos(60^{O})]^2=[cos\frac{\pi}{3}]^2=[\frac{1}{2}]^2=\frac{1}{4}.$
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: 100
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