Just the other day I'm glad I passed Yr12 maths.
Had to run through a Tan graph, coming in on the RNAV approach, after working out 4X^3 + log base 10^4 - 3c...........
Had to ensure that I wasn't going to be busting anything!
In all seriousness, i've never had to use anything from year 12 maths. Exam done (passed somehow) and DELETE button pushed (or more correctly opened!)
Pointless, but has to be done unfortuantely to meet the criteria for most places.