Question Number 80907 by peter frank last updated on 07/Feb/20
$$\left.{a}\right)\int{e}^{{x}} \mathrm{tan}\:{xdx} \\ $$$$\left.{b}\right)\int{x}\mathrm{tan}\:{xdx} \\ $$
Answered by M±th+et£s last updated on 07/Feb/20
Commented by peter frank last updated on 08/Feb/20
$${thank}\:{you} \\ $$