Who said I haven’t seen precalc? My high school is outside of the US so we don’t have AP classes, that doesn’t exist here. Everybody learns the same thing… We cover all the math, physics and chemistry,etc there is to cover in order to graduate from high school with a Scientific mention (that’s how it’s called here) It’s either a humanistic or a scientific mention. I wouldn’t go into engineering if I haven’t seen any physics or math topics like precalc…