Jean-Claude Arbaut <arbautjc at gmail.com> writes:
> I was playing with a problem on math.stackexchange.com, and I found this in
> Maxima:
>
>> integrate(cos(1/3*exp(-%i*theta)),theta,0,2*%pi);
>> 0
>
> WolframAlpha gives me 2*%pi, and it seems obvious that it can't be null
> anyway. Any hint to have the computation done right with Maxima ?
Er, cos is analytic, as is exp so you are integrating an analytic
function around a closed loop (unless I've missed something
obvious). Why are you so sure that this should give you a nonzero
answer?
Rupert
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