Texas Instruments TI-86 - Manual (Page 41)

Chapter 1: Operating the TI -86 29
01OPER.DOC TI-86, Chap 1, US English Bob Fedorisko Revised: 02/13/01 2:18 PM Printed: 02/13/01 2:59 PM Page 29 of 22 01OPER.DOC TI-86, Chap 1, US English Bob Fedorisko Revised: 02/13/01 2:18 PM Printed: 02/13/01 2:59 PM Page 29 of 22
Retrieving Multiple Entries
To store two or more expressions or instructions together to ENTRY , enter them on one
line, separating each from the other with a colon, and then press b. Upon execution,
the entire group is stored in
ENTRY . The example below shows one of many ways you can
manipulate this feature to avoid tedious manual re-entry.
ᕡ Use trial and error to find the radius
of a circle with an area of 200 square
centimeters. Store
8 to r as your first
guess, then execute p r 2 .
8 X - n ã R д
- [ : ] - ~ г R ä 1
1 I b
ᕢ Retrieve 8 ¶ r: p r 2 and insert 7.958 as a
new guess. Continue guessing to
approach the answer of
200 .
- ¢
- !
7 - p ` 958
b
Clearing the ENTRY Storage Area
To clear all data from the ENTRY storage area, begin on a blank line on the home screen,
select ClrEnt from the MEM menu (press - ™ *), and then press b.
Retrieving the Last Answer
When an expression is evaluated successfully on the home screen or in a program, the TI -86
stores the answer to a built-in variable called Ans (last answer). Ans may be a real or
complex number, list, vector, matrix, or string. When you turn off the TI -86, the value in Ans
is retained in memory.
Consecutively entered entries
separated by colons (page 26)
are stored as one entry.
The formula for finding the
area of a circle is A=
p r 2 .
The equation solver (Chapter
15) is another tool with which
you can perform this task.