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 - Page 659: 71


$\cos ^{2}\theta $

Work Step by Step

$\sin \theta \left( csc\theta -\sin \theta \right) =\sin \theta \left( \dfrac {1}{\sin \theta }-\sin \theta \right) =1-\sin ^{2}\theta =\cos ^{2}\theta $
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