Here I am thinking there was a tutorial for making calculus easy... When it's just a program for a calculator I don't even possess. :"( I guess I can fail maths happy! (:
Sorry xox.happy1.xox , if thats what you thought I meant.
to get the app on your calculator:
Put the ti 89 cd that comes in the box into your computer.
register the software with your cd and a popup might come at the top of the screen from windows, install it from that popup up too.
plug in the calculator into the computer and open up the ti 89 program and go to the caculator navigator. Click on the applications folder and just drag the "calculus app" into the folder.
Sorry if this doesnt make sense, but its what i can remember from the top of my head.
Just pm me if you need help