Apr 20, 2018 Trigonometry Functions v1.14 Contains information and formulas related to trigonometric functions. Trigfuncs.zip: 2k: 03-05-27: Trig Functions This program will calculate any trig function, allow you to change you angle mode from the program, and it has a 'Free Math' function that lets you make calculations without leaving the program. Sep 15, 2018 Derivative Approximation with Secant Line Slope. When you input the equation, you must be sure to put it in parantheses, otherwise it won't work. To input 3x, type this: '3x' and hit enter. It will show you the program's progress. Be warned, the more subdivisions you use, the more time it.