differentiate w.r.t x
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Step-by-step explanation:
[( 1 +cos^2x)2sinx .cosx - sin^2x (2cosx)(- sinx)]/(1 +cos^2 x)^2
Sin2x(1 + cos^2 x + sin^2x)/ (1 + cos^2 x )^2
2sin2x/(1+ cos^2x)^2
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