Texas Instruments TI-89 - Page 567

550 Appendix B: Reference Information
8992APPB DOC TI
-
89/TI
-
92 Plus:8992a
pp
b doc (English) Susan Gullord Revised: 02/23/01 1:54 PM Printed: 02/23/01 2:24 PM Page 550 of 34
Specifies the type of graphs you can plot.
1:FUNCTION y(x)
functions (Chapter 6)
2:PARAMETRIC x(t)
and
y(t)
parametric equations (Chapter 7)
3:POLAR r(
q
)
polar equations (Chapter 8)
4:SEQUENCE u(n)
sequences (Chapter 9)
5:3D z(x,y)
3D equations (Chapter 10)
6:DIFF EQUATIONS y'(t)
differential equations (Chapter 11)
Note:
If you use a split screen with
Number of Graphs = 2
,
Graph
is for
the top or left part of the screen and
Graph 2
is for the bottom or
right part.
Specifies the current folder. You can set up multiple folders with
unique configurations of variables, graph databases, programs, etc.
1:main
Default folder included with the
TI
-
89 / TI
-
92 Plus
.
2: —
(custom folders)
Other folders are available only if they have been
created by a user.
Selects the number of digits. These decimal settings affect only how
results are displayed—you can enter a number in any format.
Internally, the
TI
-
89 / TI
-
92 Plus
retains decimal numbers with 14
significant digits. For display purposes, such numbers are rounded to
a maximum of 12 significant digits.
1:FIX 0
2:FIX 1
…
D:FIX 12
Results are always displayed with the selected
number of decimal places.
E:FLOAT
The number of decimal places varies, depending
on the result.
F:FLOAT 1
G:FLOAT 2
…
Q:FLOAT 12
If the integer part has more than the selected
number of digits, the result is rounded and
displayed in scientific notation.
For example, in
FLOAT 4
:
12345
. is shown as
1.235
E
4
Modes
This section describes the modes of the TI
-
89 / TI
-
92 Plus and
lists the possible settings of each mode. These mode settings
are displayed when you press
3
.
Graph
Current Folder
Note: For detailed
information about using
folders, see Chapter 5.
Display Digits