this is part of an integration, thats why i posted it here.
the needed substitution here is
i end up with this sometime, which is correct:
now my book says the result should be:
and wofram alpha says it should be:
to be honest... i tried and i tried, i dont get it how i will get any of those 2 solutions. would be so nice if someone could explain it me reeeeal slow :)
thx in advance