y= (1+x^2)^(sinx)lny = sinx. ln(1+x^2)(1/y)y' = cosx. ln(1+x^2) + 2x.sinx/(1+x^2) y' =[cosx. ln(1+x^2) + 2x.sinx/(1+x^2) ] .(1+x^2)^(sinx)
