Answer
$(-\infty,-1] \cup [1,\infty)$
Work Step by Step
The graph of the secant function shows that the range of the secant function is, $y\leq-1$ or $y\geq1$.
In set notation, this can be written as $(-\infty,-1] \cup [1,\infty)$.
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 4 - Test - Page 187: 3d
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