Answer
$\sec\theta$ = - $\frac{13}{5}$
Work Step by Step
Given $\cos\theta$ = -$\frac{5}{13}$
We know that -
$\sec\theta$ = $\frac{1}{\cos\theta}$
Therefore
$\sec\theta$ = $\frac{1}{-\frac{5}{13}}$ = - $\frac{13}{5}$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 1 - Section 1.4 - Introduction to Identities - 1.4 Problem Set - Page 40: 29
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