Texas Instruments Titanium TI-89, Руководство пользователя, Страница: 333 / 977

Polar Graphing 330
Note:
You can use a negative
q
step
. If so,
q
min
must be greater than
q
max
.
Standard values (set when you select
6:ZoomStd
from the
„
Zoom
toolbar menu) are:
You may need to change the standard values for the
q
variables (
q
min
,
q
max
,
q
step
) to
ensure that enough points are plotted.
Setting the Graph Format
To display coordinates as
r
and
q
values, use:
q step Increment for the q value. Polar equations are evaluated
at:
r(
q
min)
r(
q
min+
q
step)
r(
q
min+2(
q
step))
... not to exceed ...
r(
q max)
xmin , xmax ,
ymin , ymax
Boundaries of the viewing window.
xscl , yscl Distance between tick marks on the x and y axes.
q
min = 0. xmin =
L
10. ymin =
L
10.
q
max = 2
p
(6.2831853... radians or
360 degrees) xmax = 10. ymax = 10.
q
step =
p
/24
(.1308996... radians or 7.5
degrees) xscl = 1. yscl = 1.
Variable Description