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EX 11.2 Q68 If y = 1/2 log (1-cos2x/1+cos2x) prove that dy/dx ...

[∵ log(a m ) = m × log(a)]. On differentiating y with respect to x, we get. We know. [using chain rule]. However,. We have sin(2θ) = 2sinθcosθ.

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