If y=cos ^(2) ((3x) /( 2))-sin ^(2) ((3...

If ` y=cos ^(2) ((3x) /( 2))-sin ^(2) ((3x)/( 2) ),then (d^(2)y)/( dx^(2))` =

A

` -3sqrt(1-y^(2))`

B

` 3sqrt ( 1-y^(2))`

C

` 9y`

D

` -9y`

Verified by Experts

The correct Answer is:

D

Differential Equation
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