Answer
$\theta = 0^{\circ}$
Work Step by Step
$cos~\frac{\theta}{2} = 1$
$\frac{\theta}{2} = arccos(1)$
$\frac{\theta}{2} = 0^{\circ}$
$\theta = 0^{\circ}$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 6 - Inverse Circular Functions and Trigonometric Equations - Section 6.3 Trigonometric Equations II - 6.3 Exercises - Page 273: 27
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