Answer
B
Work Step by Step
With the help of a calculator, using degree mode and inverse cosine function, we get
$\cos^{-1}0.45\approx63.25631605^{\circ}$
The appropriate approximation is B.
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 2 - Acute Angles and Right Triangles - Section 2.3 Finding Trigonometric Function Values Using a Calculator - 2.3 Exercises - Page 66: 2
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