(Hi, you can put t=kx then use residues).
Sorry, t=x/k is better.
hi there,
i have problems solving the following integral:
\int_{-\infty}^{\infty} \dfrac{\cos(x\k)}{x^2+k^4}\,dx
i could not come up with an appropriate substitution (even for k = 1). i also tried integration via Euler's formula - could not work that out either.
anybody an idea on how to attack this problem? many thanks in advance!!!
best,
Stefan