Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 7 - Trigonometric Identities and Equations - 7.2 Verifying Trigonometric Identities - 7.2 Exercises - Page 666: 43


$\cos^2 x$

Work Step by Step

$1-\frac{1}{\csc^2 x}$ $=1-\frac{1}{\frac{1}{\sin^2 x}}$ $=1-\sin^2 x$ $=\cos^2 x$
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