Precalculus (6th Edition)

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

Chapter 7 - Trigonometric Identities and Equations - 7.1 Fundamental Identities - 7.1 Exercises: 62

Answer

$\tan^2\theta$

Work Step by Step

$(\sec\theta-1)(\sec\theta+1)$ $=\sec^2\theta+\sec\theta-\sec\theta-1$ $=\sec^2\theta-1$ $=\tan^2\theta$
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