# Chapter 4 - Test - Page 193: 3d

$(-\infty,-1] \cup [1,\infty)$

#### 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 $(-\infty,-1] \cup [1,\infty)$.

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