Answer
$-\cot^2x$
Work Step by Step
$\cos^2x+\sin^2x-\csc^2 x=1-\csc^2 x=-\cot^2x$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 14 Trigonometric Graphs, Identities, and Equations - Chapter Test - Page 969: 8
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