Deriv by Jai Park, 7/10/04
-okay I have been thinking after i bought my ti-89 about what to do with my obsolete ti-83
and also thought "man my 83 sucks considering it can't even get derivatives!"
so i came up with this ingenious plan again, spending my precious 1 minute.
What does it do? well, it doesn't actually get derivatives for you, BUT gives you the
answer if u have multiple choices given!

   Suppose you have a calculus question "What is the derivative of (sin x)?"
   Obviously answer is (cos x), right? And also suppose you are given choices
   (A)x^2    (B)tan x    (C)cos x    (D)0      (E)-cos x


Now you put these choices into the calc, and it's going to display
  CHOICE C
in this case, you MUST use RADIAN mode to get the correct result cause it's a 
trigonometric question.


Convinient right? well i know it's easy to program, but i think this saves a whole 
lot of time when you are in calculus(especially pre-calculus)

As long as you put the inputs correctly, it's going to be able to solve ANY 
complicated questions, such as: f'((sin^2 x)(tan^2 x)/ln x)
Just make sure you've got choices. It's kinda cheap, but I created this ONLY
for checkings(at least for me)!!!!!!!! Have fun!