Answer
$-csc~u$
Work Step by Step
$csc(-u)=\frac{1}{sin(-u)}=\frac{1}{-sin~u}=-csc~u$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 7 - 7.2 - Verifying Trigonometric Identities - 7.2 Exercises - Page 520: 7
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