Texas TI-86 Manuale Utente

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 119 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 119 of 8

To display the format screen in 

 graphing mode, select 

 from the 

GRAPH

 menu

(6 / (). Chapter 5 describes the format settings. Although the same settings are
available for 

, 

, and 

 graphing modes, the TI

-86 retains in memory separate

format settings for each mode. In 

 graphing mode, 

 shows the cursor coordinates

in terms of 

 and 

, the variables that define the equations.

To plot the selected polar equations, you can select 

, 

, 

, 

, or a

, 

, 

, or 

 operation, from the 

GRAPH

 menu. The TI

-86 evaluates 

 for

each value of 

 (from 

 to 

 in intervals of 

) and then plots each point. As the

graph is plotted, the variables 

, 

, 

, and 

 are updated.

The free-moving cursor in 

 graphing works the same as in 

 graphing.

♦ 

In 

 format, moving the cursor updates the values of 

 and 

; if 

 format is

selected, 

 and 

 are displayed.

♦ 

In 

 format, moving the cursor updates 

, 

, 

, and 

; if 

 format is

selected, 

 and 

 are displayed.

 graph format

typically displays a more
meaningful polar graph than

 graph format.