Answer
$-1$
Work Step by Step
The secant is an even function so
$\sec{(- \theta)} = \sec{ \theta}$
Thus,
$\sec{(-\pi)}= \sec{\pi} = \boxed{-1}$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 5 - Trigonometric Functions - Section 5.3 Properties of the Trigonometric Functions - 5.3 Assess Your Understanding - Page 418: 74
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