Calculs d'intégrale

[Snark]

I was making experiments with integral computations, and found strange results :

int(sin(x)*exp(-i*x),x,0,2*pi); => undef

fourier_cn(sin(x),x,2*pi,0,1); => nice-looking result

I couldn't find how to do numeric integration either

Is there some way to do those computations?