#### Answer

D

#### Work Step by Step

$\cos \left( \dfrac {\pi }{2}-x\right) =\cos \dfrac {\pi }{2}\cos x+\sin \dfrac {\pi }{2}\sin x=0\times \cos x+1\times \sin x=\sin x\Rightarrow 3\rightarrow D$

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

D

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