Texas Instruments TI-86 - Manual (Page 133)

Chapter 8: Polar Graphing
121
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 121 of 8 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 121 of 8
Moving the Trace Cursor to a q Value
To move the trace cursor to any valid q value on the current equation, enter the number.
When you enter the first digit, a q = prompt is displayed in the bottom-left corner. The value
you enter must be valid for the current graph screen. When you have completed the entry,
press b to reactivate the trace cursor.
Using Zoom Operations
The GRAPH ZOOM menu items, except ZFIT , work the same in Pol graphing as in Func
graphing. In Pol graphing mode, ZFIT adjusts the graph screen in both the x and y directions.
The zoom operations affect only the x window variables ( xMin , xMax , and Xscl ) and the y
window variables ( yMin , yMax , and yScl ), except ZSTO and ZRCL , which also affect the q
window variables ( q Min , q Max , and q Step ).
In the example, r1=8sin(2.5 q )
is graphed.
Values for q , x, and y are
displayed on the graph to the
right because RectGC graph
format is selected.