Precalculus (6th Edition)

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

Chapter 7 - Trigonometric Identities and Equations - 7.3 Sum and Difference Identities - 7.3 Exercises - Page 679: 57

Answer

$\dfrac {\sqrt {2}}{2}$

Work Step by Step

$\sin 76\cos 31-\cos 76\sin 31=\sin \left( 76-31\right) =\sin 45^{0}=\dfrac {\sqrt {2}}{2}$
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