Fin d the derivative of `(sin x)/(x+e^(x))` with respect to 'x'.

Explanation

Let `y=(sin x)/(x+e^(x))`
`rArr(dy)/(dx)=(d)/(dx)((sinx)/(x+e^(x)))`
`=((x+e^(x))(d)/(dx)sinx-sinx(d)/(dx)(x+e^(x)))/((x+e^(x))^(2))`
`=((x+e^(x)).cos x-sinx(1+e^(x)))/((x+e^(x))^(2))` .