Answer
$\tan^{-1} (1)=\frac{\pi}{4}$
Work Step by Step
Let $x$ =$\tan^{-1}(1)$ implies that:
$x$ =$\tan^{-1}(1)$ implies that $\tan (x) =1$
Using exact values,
$x=\frac{\pi}{4}$
Therefore: $\tan^{-1}(1)=\frac{\pi}{4}$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 7 - Analytic Trigonometry - Chapter Review - Review Exercises - Page 505: 3
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