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Trigonometric Ratios and Identities

Quick practice

Question 1 of 5

If \sin x+\cos x=\sqrt{2} \cos x , then \cos x -\sin x is equal to

A


\sqrt{2} cos\:x

B


\sqrt{2} \sin x

C


-\sqrt{2} \sin x

D


-\sqrt{2} \cos x

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