Texas Instruments TITANIUM TI-89 User Manual
Page 344
Polar Graphing
344
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
Setting the Graph Format
Setting the Graph Format
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