Answer
$1.08$
Work Step by Step
With a calculator in radian mode, use its inverse cosine function and round the answer to two decimal places to obtain
$\cos^{-1}\left(\frac{\sqrt2}{3}\right)\approx1.08$
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: 37
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