I ask because MUCH to my distress, MMa returns wrong results for the equation that's the entire basis of Fourier Analysis and hence most of Filter Theory, the integral of products of cosines:
The post received lots of Comments about generic/non-generic solutions, with links to other posts about similar issues, but no reliable work-around yet.
The strange part is that comments say it's unfeasible for MMa to handle all the obscure special cases, but this particular result is HUGELY important, not an obscure case at all. A lot of important stuff bombs of MMa gets this particular equation wrong.
So is there a list somewhere of problems like this so I can plan around them? A list with links to suggested work-around would be great, too. If such a list does not exist, it needs to exist and be accessible from this site.