Answer
$x=\cos 2$ or $x\approx -0.416$
Work Step by Step
$\cos^{-1}(x)=2$ (Using the property $y=\cos (x) \Leftrightarrow x=\cos^{-1}(y)$)
$x=\cos (2)$
$x=-0.41614....$
$x\approx -0.416$
Thus, $x=\cos 2$ or $x\approx -0.416$.
Calculus: Early Transcendentals 9th Edition
by Stewart, James
Published by
Cengage Learning
ISBN 10:
1337613924
ISBN 13:
978-1-33761-392-7
Chapter 1 - Review - Exercises - Page 69: 34
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