> Euler's formula
So much EE-related math becomes trivial (or at least not-hard) once you've internalized this formula.
What I am trying to decide is 1) Did I zone out in class when Euler's formula was introduced or 2) Did my secondary school mathematics classes just kind of gloss over it?
I lean towards 2 but unfortunately none of my college classes reintroduced the formula and I ended up making a lot of problems harder than they should have been (I have an EE undergrad).
I'm not sure any of my secondary-school classes taught it, but I dropped out of secondary school to go to the university, so maybe they would have in the following year. In secondary school I was in the "smart kids" math track, though, and they also had an "average kids" track and a "dumb kids" track, and I really doubt those tracks covered it.