我在哪里可以学习游戏物理的基础知识及其背后的数学知识？

I taken math in college (trigonometry, calculus II...) but I don't know why you use tan, arctan, etc., in game physics. I know I can find working code and understand everything except why I am using a particular trig function, but I don't want that.I taken math in college (trigonometry, calculus