Answer
$ \frac{\pi}{5}$
Work Step by Step
$sin^{-1}(sin\frac{11\pi}{5})=sin^{-1}(sin\frac{\pi}{5})=\frac{\pi}{5}$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 6 - Analytic Trigonometry - Chapter Test - Page 529: 3
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