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: 41



Work Step by Step

$\frac{\sin^2x}{\cos^2x}+\sin x\csc x$ $=(\frac{\sin x}{\cos x})^2+\sin x*\frac{1}{\sin x}$ $=\tan^2x+1$ $=\sec^2x$
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