These are a bunch of various programs I made for my TI-84 graphing calculator. They are usually adaptions of common mathemathical functions, just so you don't need to do bitch work.
Granted, one could argue that I could just actually do the math instead of creating programs to do it for me..
This app is an adaption of the cosine law. It has 4 inputs:
A / thetha - the angle/side that you want to solve for A / thetha - the coressponding angle/side that of the unknown angle or side B - Another side that you know C - Another side that you know
When you want to solve for an angle/side, simply plug in 0 for A or thetha, and then the program will take care of the rest!