Answer
$-\pi$ and $\pi$
Work Step by Step
Using a graphing utility, the graphs of $y_1$ and $y_2$ are as shown.
From the graph, the real values of $x$ are $-\pi$ and $\pi$.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 6 - 6.4 - Graphs of Sine and Cosine Functions - 6.4 Exercises - Page 465: 74
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