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Texas Instruments TI-89 Titanium User Manual

Texas Instruments TI-89 Titanium
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Numeric Solver 651
Refer to a function or equation
defined elsewhere.
Notes:
Do not use system function
names (such as
y1(x) or r1(q))
as simple variables (
y1 or r1).
Be careful with implied
multiplication. For example,
a(m2+m1) is treated as a
function reference, not as
a(m2+m1).
Suppose you defined y1(x) on either
the:
•Y= Editor:
y1(x)=1.25xcos(x)
– or –
Home screen:
Define y1(x)=1.25xcos(x)
In the Numeric Solver, you then would
enter:
y1(x)=0 or y1(t)=0, etc.
Type an expression without an =
sign.
Note: When you define the
variables, you can either define
exp or solve for it.
e+f
Nln(g)
After you press
¸, the expression
is set equal to a system variable called
exp and entered as:
exp=e+fNln(g)
Recall a previously entered
equation or open a saved
equation.
Note: After you press
¸ the
current equation is stored
automatically to the system
variable eqn.
Refer to the applicable heading later in
this section.
You can: For example:
The argument does
not have to match
the one used to
define the function
or equation.

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Texas Instruments TI-89 Titanium Specifications

General IconGeneral
Display TypeLCD
Display Resolution160 x 100 pixels
CPUMotorola 68000
CPU Speed16 MHz
RAM256 KB
Flash ROM2.7 MB
Programming LanguageTI-BASIC, Assembly
Power Source4 AAA batteries
ConnectivityI/O port
Dimensions7.5 x 3.5 x 1 inches

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