Texas Instruments TI-89 Manual Book page 67

Tip: Editing an entry lets
you make minor changes
without retyping the entire
entry.
Note: When the entry
contains a decimal point, the
result is automatically
displayed in floating-point.
Recalling a Previous
Entry
Note: You can also use the
entry function to recall any
previous entry. Refer to
entry() in Appendix A.
50 Chapter 2: Operating the Calculator
Using the equation
A=pr
circle that covers 200 square centimeters.
The example below uses
answer in its approximate floating-point form. You can edit and
reexecute using and continue until the answer is as accurate as
7.95
you want.
On the TI.89: On the TI.92 Plus:
8 § j R 2 Ë 8 § R 2 Ë
2 ã p ä j R Z 2 2 T R Z 2
¸ ¸
¥ ¸ ¥ ¸
A ¥ 8 A ¥ .
7.95¸ 7.95¸
You can recall any previous entry that is stored in the history area,
even if the entry has scrolled off the top of the screen. The recalled
entry replaces whatever is currently shown on the entry line. You can
then reexecute or edit the recalled entry.
To recall: Press:
2 ²
The last entry
(if you've changed once
the entry line)
2 ²
Previous entries
repeatedly
For example:
If the entry line contains
the last entry, 2 ²
recalls this entry.
If the entry line is edited
or cleared, 2 ²
recalls this entry.
2
, use trial and error to find the radius of a
as the first guess and then displays the
8
Effect:
If the last entry is still shown on
the entry line, this recalls the
entry prior to that.
Each press recalls the entry
prior to the one shown on the
entry line.
Display