I took both applied math and pure math (+ comp. sci) at uni, and was similarly frustrated at the applied math, which was all triple integrals and partial deriva

I took both applied math and pure math (+ comp. sci) at uni, and was similarly frustrated at the applied math, which was all triple integrals and partial derivatives etc, and exactly zero examples given of where this stuff would be useful. I just stopped attending the class, since the downside of doing so was minimal. To this day I still don't know where one might apply triple integrals, although no doubt there are uses. Perhaps a bit oddly I didn't have any problem with the pure math prof. also not offering any use cases, although of course it also does!