Texas Instruments TI-89 Titanium User Manual page 218

Evaluating a Function
You can use a user-defined function just as
you would any other function. Evaluate it by
itself or include it in another expression.
Displaying and Editing a Function Definition
To:
Display a list of all
user-defined functions
Display a list of Flash
application functions
Calculator Home Screen
Do this:
2 °
Press
screen. You may need to use the
menu to specify the Function variable type. (Refer
to Memory and Variable Management.)
– or –
Press:
@ ½ †
Press:
@ ½ ...
to display the VAR-LINK
„
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