Texas Instruments TITANIUM TI-89 - Manual (Page 477)

Additional Graphing Topics 477
Note: To enter when , type it or use the CATALOG .
where:
Nested functions quickly become complex and difficult to visualize.
Using a Multi-Statement, User-Defined Function Using a Multi-Statement, User-Defined Function Using a Multi-Statement, User-Defined Function Using a Multi-Statement, User-Defined Function
For three or more pieces, you may want to create a multi-statement, user-defined
function.
When: Use expression:
x < Mp 4 sin(x)
x | M p and x < 0 2x + 6
x | 0
6 – x
2
In the Y= Editor:
y1(x)=when(x<0,when(x< M p ,4
ù
sin(x),2x+6),6 N x^2)
This nested function is in effect when x<0.