User Manual

118
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 118 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 118 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 118 of 8
Displaying the Polar Equation Editor
To display the polar equation editor, select
r(
q
)=
from the
GRAPH
menu in
Pol
graphing mode
(
6 &
). The polar equation editor menu displayed on the bottom line is the same as the
Func
mode equation editor menu, except that
q
and
r
replace
x
and
y
.
In this editor, you can enter and display up to 99 polar
equations,
r1
through
r99
, if sufficient memory is available.
Equations are defined in terms of the independent variable
q
.
The default graph style is
»
(line) in
Pol
graphing mode.
¾
(shade above) and
¿
(shade below) graph styles are not
available in
Pol
graphing mode.
Setting the Graph Screen Window Variables
To display the polar window editor, select
WIND
from the
GRAPH
menu (
6 '
).
Pol
graphing mode has the same
window variables as
Func
graphing mode, except:
♦
xRes
is not available in
Pol
graphing mode.
♦
q
Min
,
q
Max
, and
q
Step
are available in
Pol
graphing mode.
The values shown in the picture to the right are the
defaults in
Radian
mode.
$
indicates that
yMin=
L
10
,
yMax=10
, and
yScl=1
are beyond the screen.
q
Min=0
Specifies the first
q
value to evaluate within the graph screen
q
Max=6.28318530718
Specifies the last
q
value to evaluate within the graph screen
q
Step=.13089969389957
Specifies the increment from one
q
value to the next
q
value
q
Max
default is 2
p
.
q
Step
default is
pà
24.