Answer
$1.11+k\pi$, $-1.11+k\pi$
Work Step by Step
$\tan^2\theta-4=0$
$\tan^2\theta=4$
$\tan\theta=\pm 2$
If $\tan \theta=2$, then $\theta\approx1.11+k\pi$.
If $\tan \theta=-2$, then $\theta\approx-1.11+k\pi$.
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 7 - Section 7.4 - Basic Trigonometric Equations - 7.4 Exercises - Page 569: 35
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