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If 2 sin^(2) ((pi//2) cos^(2) x)=1-cos (...

If `2 sin^(2) ((pi//2) cos^(2) x)=1-cos (pi sin 2x), x ne (2n + 1) pi//2, n in I`, then `cos 2x` is equal to

A

`1/5`

B

`3/5`

C

`4/5`

D

1

Text Solution

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The correct Answer is:
B
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