Answer
$-\frac{\pi}{3}$
Work Step by Step
$tan^{-1}(tan\frac{2\pi}{3})=tan^{-1}(-tan\frac{\pi}{3})=tan^{-1}(-\sqrt 3)=-\frac{\pi}{3}$.
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: 11
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