Parametric Graphing - Texas Instruments TI-89 Titanium User Manual

Steps and keystrokes
5. Select the
ZoomStd
which automatically graphs the
functions.
In the standard viewing window, both the
x and y axes range from L10 to 10.
However, this range is spread over a
longer distance along the x axis than the
y axis. Therefore, the circle appears as
an ellipse.
Press „ 6
6. Select
ZoomSqr
increases the range along the
ZoomSqr
x axis so that circles and squares are
shown in correct proportion.
Press „ 5
There is a gap between the top and bottom halves of the circle because each half
Note:
is a separate function. The mathematical endpoints of each half are (L5,0) and (5,0).
Depending on the viewing window, however, the plotted endpoints for each half may be
slightly different from their mathematical endpoints.

Parametric Graphing

Graph the parametric equations describing the path of a ball kicked at an angle (q) of 60¡
with an initial velocity (v
Previews
viewing window,
.
) of 15 meters/sec. The gravity constant g = 9.8 meters/sec
0
Display
Notice slight gap
between top and
bottom halves.
2
.
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