I have started studying for an important professional certification exam, the Fundamentals of Engineering test.  I will be sitting for the exam in April.  To pass the test I am going to need to bury myself in pretty much everything I learned in 5+ years of college, including things from freshman year that I didn't really pay attention to and some stuff I'm not entirely convinced I actually learned in the first place.  Only 5-10% of what is on the test includes things that I use with anything that even resembles frequency as a working engineer.  This is why engineering certification exams are stupid.

But, I want to continue growing as a professional (read: get money, get get money) so I will study, and practice, and bitch about everything I learned, forgot, forgot I knew, and now need to learn all over again.  Today's topic, mathematics.  So, here's some shit I forgot I knew.

L'Hopital's rule.  Has nothing to do with hospitals. Last seen: freshman year, Calc 2.
Cross product and dot product. Last seen: junior year, Dynamics.
Conic sections. Motherfucker! I haven't seen these since high school.
Integration by parts. Freshman year, Calc 2 again.  I remember that these things existed, but completely forgot how to do it.
Taylor Series.  Freshman year, Calc 2 (and by the time we got here, I had mentally checked out on the course, which I did alot in freshman year).
Trig identities. You know, I'm really starting to wish I'd paid attention in Calc 2...
Complex numbers. Junior year, Signals and Circuits class.
Laplace transforms.  Junior year, Signals and Circuits.
Differential equations. Okay, I used these alot in graduate school, but not once have I had to solve a goddamn differential equation at work. Is there such a job? Where you sit at a desk, and somebody pays you to solve differential equations? And how long do people typically work at this job before they kill themselves?

One section down, another dozen to go.