Texas Instruments TI-89 Titanium User Manual

Parametric Graphing 338
Standard values (set when you select 6:ZoomStd from the „ Zoom toolbar menu) are:
You may need to change the standard values for the
t variables (tmin, tmax, tstep) to
ensure that enough points are plotted.
Exploring a Graph
As in function graphing, you can explore a graph by using the following tools.
Note: During a trace, you can also evaluate x(t) and y(t) by typing the t value and
pressing ¸. You can use QuickCenter at any time during a trace, even if the cursor is
still on the screen.
xscl, yscl Distance between tick marks on the x and y axes.
tmin = 0
xmin = L10. ymin = L10.
tmax = 2p
(6.2831853... radians
or 360 degrees)
xmax = 10. ymax = 10.
tstep =
p/24
(.1308996... radians
or 7.5 degrees)
xscl = 1. yscl = 1.
Tool For Parametric Graphs:
Free-Moving
Cursor
Works just as it does for function graphs.
Variable Description

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches