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(An)/(Bn) is equal to (theta=pi/n) (2th...

`(A_n)/(B_n)` is equal to `(theta=pi/n)` `(2theta-sin2theta)/(sin2theta-thetacos^2theta)` (b) `(2theta-sintheta)/(sin2theta-thetacos^2theta)` `(theta-costhetasintheta)/(costheta(sintheta-thetacostheta)` (d) none of these

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