On my HP Prime, when I try to solve an inverse Laplace of the transform of a trig function, it returns a complex equation (Euler's Identity?), rather than the trig function. Another thread suggested purge(x), but that didn't work for me. This seems to only affect trig transforms, since non-trig inverse Laplace solutions are correct. Any help would be appreciated!
In case the screenshot doesn't work:
ilaplace(s/(s^2 + 4),s) –> 1/2 * e^(-2 * i * s) + 1/2 * e^(2 * i * s)