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now is the question y = sinh ^(2x) /1 +cosh^(2x) or y= sinh^2 x/(1+cosh^2 x)
in first case take log on both side log y =2x log sinh -log(1+cosh^2x)
now differentiate dy /dx= y( 2logsinh - {[1/1+cosh^2x] cosh^2x log cosh *2
correct me if i m wrong but surely we have to take log rate me if i m right
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