Texas Instruments TI-89 Manuel D’Utilisation

Parametric Graphing

352

Standard values (set when you select

6:ZoomStd

from the

„

Zoom

toolbar menu) are:

You may need to change the standard values for the

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

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 =

10.

ymin =

10.

tmax = 2

(6.2831853... radians
or 360 degrees)

xmax = 10.

ymax = 10.

tstep =

/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