Texas Instruments Titanium TI-89 User Manual

Operating the Calculator 169
Note: To retain an EXACT form, use fractions instead of decimals. For example, use 3/2
instead of 1.5.
The following chart compares the three settings.
Note: To evaluate an entry in APPROXIMATE form, regardless of the current setting,
press 8 ¸.
Display Digits Mode
Display Digits ModeDisplay Digits Mode
Display Digits Mode
By default,
Display Digits = FLOAT 6, which means that results are rounded to a
maximum of six digits. You can use 3 to select different settings. The settings apply
to all exponential formats.
Entry
Exact
Result
Approximate
Result
Auto
Result
8/4 2 2. 2
8/6 4/3 1.33333 4/3
8.5
ù3
51/2 25.5 25.5 — A decimal in the
entry forces a
floating-point result
in AUTO.
‡(2)/2
.707107
pù22⋅p
6.28319
2
⋅p
pù
2. 2⋅p
6.28319 6.28319
2
2
-------
2
2
-------

Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)