Answer
$1$
Work Step by Step
$\dfrac {\cos x}{secx}+\dfrac {\sin x}{cscx}=\dfrac {\cos x}{\dfrac {1}{\cos x}}+\dfrac {\sin x}{\dfrac {1}{\sin x}}=\cos ^{2}x+\sin ^{2}x=1$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
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: 16
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