The equation 2 sin""(x)/(2) cos^(2)x-2 ...

The equation ` 2 sin""(x)/(2) cos^(2)x-2 sin""(x)/(2) sin^(2) x =cos^(2)x-sin^(2)x ` has a root for which the false statement is

A

sin 2x =1

B

` cos x=(1)/(2)`

C

`cos 2x=-(1)/(2)`

D

`cos x =1 `

Verified by Experts

The correct Answer is:

D

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