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જો cos^-1 (x/a)+cos^-1(y/b)=thetaતો (x^2...

જો `cos^-1 (x/a)+cos^-1(y/b)=theta`તો `(x^2)/(a^2)-(2xy)/(ab)costheta +(y^2/b^2)`ની કિમત શોધો

A

`sin^2 theta `

B

`cos^2 theta `

C

`tan^2 theta `

D

`sec^2 theta `

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