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જો sin^-1 (x/2)-sin^-1(y/3)=theta તો 9x...

જો `sin^-1 (x/2)-sin^-1(y/3)=theta` તો `9x^2-12xycostheta+4y^2`=_______

A

`9sin^2theta`

B

`18sin^2theta`

C

`36sin^2theta`

D

`48sin^2theta`

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