Answer
$-4\pi/3$ and $2 \pi/3$
Work Step by Step
We can do this by subtracting $2 \pi$ until we get a negative number.
Subtracting $2\pi$ 3 times gives us $2 \pi/3$ and once more gives us $-4\pi/3$.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 13, Trigonometric Ratios and Functions - 13.2 Define General Angles and Use Radian Measure - 13.2 Exercises - Skill Practice - Page 863: 22
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