Especially built-in functions like interpolation. Understand how differentiation and integration works. Aero engineers, at least in school, use calculus everyday. Pay attention to how to do numerical integration. Learn MS Office especially Exel and Power point.
Reports require charts, and graphs and presentations are everywhere.
For real engineering use Mat lab or Mathcad you can see the equations that you are using and check units - and get practice programming. I have trouble remembering what the variable in bd1654 was, but DynamicPressure or q is pretty descriptive. Signing bonuses are much better than that. This is a great safety net if there are cutbacks in the aerospace industry. They are so short that they are importing people from India to write code in virtually every company there is.