Texas Instruments TITANIUM TI-89 User Manual
Page 169
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 Mode
Display 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
ù
3
51/2
25.5
25.5 — A decimal in the
entry forces a
floating-point result
in AUTO.
‡
(2)/2
.707107
pù
2
2
⋅
p
6.28319
2
⋅
p
pù
2.
2
⋅
p
6.28319
6.28319
2
2
-------
2
2
-------