Texas Instruments TITANIUM TI-89 - Manual (Page 345)

Polar Graphing 345
ƒ
9
– or –
8 Í
to set Coordinates = POLAR . If Coordinates = RECT , the polar equations will be graphed
properly, but coordinates will be displayed as x and y.
When you trace a polar equation, the q coordinate is shown even if Coordinates = RECT .
Exploring a Graph Exploring a Graph Exploring a Graph Exploring a Graph
As in function graphing, you can explore a graph by using the following tools. Any
displayed coordinates are shown in polar or rectangular form as set in the graph format.
Tool For Polar Graphs:
Free-Moving
Cursor Works just as it does for function graphs.
„
Zoom Works just as it does for function graphs.
• Only x ( xmin , xmax , xscl ) and y ( ymin , ymax , yscl )
Window variables are affected.
• The q Window variables ( q min , q max , q step ) are not
affected unless you select 6:ZoomStd (which sets
q min = 0 , q max = 2 p , and q step = p /24 ).