What is the derivative of f(x)=arctan(ex)f(x) = \arctan(e^x)f(x)=arctan(ex)?
ex/(1+e2x)e^x / (1 + e^{2x})ex/(1+e2x)
1/(1+ex)1 / (1 + e^x)1/(1+ex)
exe^xex
exarctan(ex)e^x \arctan(e^x)exarctan(ex)