I'd love to hear which ones you have to look up repeatedly over time, or ones that tend to be the most problematic.
Recent community posts
I think I'm going to put together a DLL library for mathematics calculations that I tend to use or see others use in game development. Things like linear functions (the whole idea was over the fact that I had to go and look up the slope point form... again), parabolas (the aiming a ball in an arc problem), the quadratic formula, and other such problems. My main goal is to make something accessible over multiple languages and engines, mostly. I'm still gathering a list of all the problems I want to add.