Simple TI-89 program

Thread Starter

guitarguy12387

Joined Apr 10, 2008
359
Hello,

I want to make a simple TI-89 titanium function that will simply take two resistor values as inputs and output the parallel combination of the two. I have no problem doing this as a program, but the problem is that it outputs the answer to the PrgmIO tab. The problem, however, is that I want to be able to use the function in expressions (like a cos() function for example). I assume that writing a function (as opposed to a program) would do this, but i'm not sure how to make it output to the home screen... when i try to use my function, it gives an error when trying to use the Disp function.

Anybody have any idea how to do this?
 

Thread Starter

guitarguy12387

Joined Apr 10, 2008
359
Thanks. Yeah i saw that link... i kinda want to do that... but i want it do be sort of saved... i don't want to have to define a new user defined function every time.
 
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