Answer
False
Work Step by Step
$2\cos (38^{\circ} 22') = 1.568109388$
$\cos (76^{\circ} 44') = 0.2994835258$
$2\cos (38^{\circ} 22') \ne \cos (76^{\circ} 44')$
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 2 - Acute Angles and Right Triangles - Section 2.3 Finding Trigonometric Function Values Using a Calculator - 2.3 Exercises - Page 64: 52
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