Texas Instruments TI-86 - Manual (Page 130)

118
Chapter 8: Polar Graphing
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 118 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 118 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 118 of 8
Displaying the Polar Equation Editor
To display the polar equation editor, select r( q )= from the GRAPH menu in Pol graphing mode
(6 &). The polar equation editor menu displayed on the bottom line is the same as the
Func mode equation editor menu, except that q and r replace x and y .
In this editor, you can enter and display up to 99 polar
equations,
r1 through r99 , if sufficient memory is available.
Equations are defined in terms of the independent variable q .
The default graph style is » (line) in Pol graphing mode.
¾ (shade above) and ¿ (shade below) graph styles are not
available in
Pol graphing mode.
Setting the Graph Screen Window Variables
To display the polar window editor, select WIND from the
GRAPH menu (6 '). Pol graphing mode has the same
window variables as Func graphing mode, except:
♦
xRes is not available in Pol graphing mode.
♦
q Min , q Max , and q Step are available in Pol graphing mode.
The values shown in the picture to the right are the
defaults in
Radian mode. $ indicates that yMin= L 10 , yMax=10 , and yScl=1 are beyond the screen.
q Min=0 Specifies the first q value to evaluate within the graph screen
q Max=6.28318530718 Specifies the last q value to evaluate within the graph screen
q Step=.13089969389957 Specifies the increment from one q value to the next q value
q Max default is 2 p .
q Step default is pа 24.