Texas Instruments Titanium TI-89 User Manual

Operating the Calculator 200
Displaying a Variable
Displaying a VariableDisplaying a Variable
Displaying a Variable
If the variable is undefined, the variable name is shown in the result.
Using a Variable in an Expression
Using a Variable in an ExpressionUsing a Variable in an Expression
Using a Variable in an Expression
1. Type the variable name.
2. Press ¸.
In this example, the variable a is undefined.
Therefore, it is used as a symbolic variable.
Note: Refer to Symbolic Manipulation for
information about symbolic manipulation.
1. Type the variable name into the
expression.
2. Press ¸ to evaluate the expression.
Note: To view a list of existing variable
names, use 2 ° as described in
Memory and Variable Management.
If you want the result to replace the variable’s
previous value, you must store the result.
The variable’s value
did not change.

Texas Instruments Titanium TI-89 Specifications

General

Brand	Texas Instruments
Model	Titanium TI-89
Category	Calculator
Language	English