Answer
$0.93.$
Work Step by Step
I use a calculator in radian mode and then round the result, hence: $\cos^{-1}(0.6)=0.9273\approx0.93.$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 7 - Trigonometry and Periodic Functions - 7.1 The Inverse Sine, Cosine, and Tangent Functions - 7.1 Assess Your Understanding - Page 451: 28
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