Texas Instruments TITANIUM TI-89 - 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