Question

Please help me complete this integration (click to see).

Answer 1

\[\int\limits_{}^{}e ^{-x}\tan(e ^{-x})dx\]

this is where I am stuck...
\[(-1)\int\limits_{}^{}\frac{ \sin(u) }{ \cos(u) }du\]

Answer 2

@abb0t

Answer 3

How about \(w=\cos(u)\)?

Answer 4

Right, but what happens to the notation (du)

Answer 5

\(dw = -\sin(u)du\)

Answer 6

oh ok i think i get it now