Let
u = tan(e^-x) and v' = e^-x and try to use integration by parts. [I suggest v' as I do because it's easier to integrate. You might have to use a different method]
EDIT: You can also use u substitution and let u = e^-x
e ^ -x * tan(e^ -x)
Sorry I would try and explain everything I've tried but i'm on pre-test overload going through tons of problems.
I thought maybe u would be e to the -x but I couldn't get it to work.
thanks
Let
u = tan(e^-x) and v' = e^-x and try to use integration by parts. [I suggest v' as I do because it's easier to integrate. You might have to use a different method]
EDIT: You can also use u substitution and let u = e^-x