Answer
$\pi/6$
Work Step by Step
We can subtract 2$\pi$ from the value inside to get $\pi/6$. So $\pi/6$ is in the right range of the unit circle. So the answer is $\pi/6$.
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 5 - Review - Exercises - Page 464: 51
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