120
Chapter 8: Polar Graphing
08POL.DOC TI-86, Chap 8, US English Bob Fedorisko Revised: 02/13/01 2:26 PM Printed: 02/13/01 3:02 PM Page 120 of 808POL.DOC TI-86, Chap 8, US English Bob Fedorisko Revised: 02/13/01 2:26 PM Printed: 02/13/01 3:02 PM Page 120 of 808POL.DOC TI-86, Chap 8, US English Bob Fedorisko Revised: 02/13/01 2:26 PM Printed: 02/13/01 3:02 PM Page 120 of 8
Tracing a Polar Equation
To begin a trace, select
TRACE
from the
GRAPH
menu (press
6
)
). The trace cursor
appears on the first selected equation at
q
Min
.
♦
In
RectGC
format, moving the trace cursor updates the values of
q
,
x
, and
y
; if
CoordOn
format is selected,
q
,
x
, and
y
are displayed.
♦
In
PolarGC
format, moving the trace cursor updates
x
,
y
,
r
, and
q
; if
CoordOn
format is
selected,
r
and
q
are displayed.
To move the trace cursor... Press:
Along the graph of the equation by increments or decrements of
q
Step
"
or
!
From one equation to another
#
or
$
If you move the trace cursor beyond the top or bottom of the graph screen, the coordinate
values at the bottom of the screen continue to change appropriately.
If you have graphed a family of curves,
#
and
$
move through each curve before moving
to the next polar equation.
QuickZoom is available in
Pol
graphing; panning is not
(Chapter 6).
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