Answer
$\theta=30^o$
Work Step by Step
Use a scientific calculator's inverse cosine function in degree mode to obtain:
$\theta = \arccos{(\frac{\sqrt3}{2})}
\\\theta=30^o$
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 - Test - Page 287: 3a
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