Answer
$(-\infty,\infty).$
Work Step by Step
For any value of $\theta$ for which $\tan$ is defined, $-\infty\lt \tan\theta\lt\infty$, hence the range is $(-\infty,\infty).$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 6 - Trigonometric Functions - 6.3 Properties of the Trigonometric Functions - 6.3 Assess Your Understanding - Page 395: 103
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