If 2sin^2((pi/2)cos^2x)=1-cos(pis in2x),...

If `2sin^2((pi/2)cos^2x)=1-cos(pis in2x),x!=(2n+1)pi/2,n in I ,` then `cos2x` is equal to `1/5` (b) `3/5` (c) `4/5` (d) `1`

A

x=1

B

x=2

C

x=3

D

x=4

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The correct Answer is:

a,c

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