Texas Instruments TI-89 Guide Book

308 Chapter 17: Programming
17PROGRM.DOC TI-89/TI-92 Plus: Programming (English) Susan Gullord Revised: 02/23/01 1:14 PM Printed: 02/23/01 2:18 PM Page 308 of 40
Command Description
Circle or
PxlCrcl
Draws, erases, or inverts a circle with a specified
center and radius.
DrawSlp
Draws a line with a specified slope through a
specified point.
Line or
PxlLine
Draws, erases, or inverts a line between two sets of
coordinates.
LineHorz or
PxlHorz
Draws, erases, or inverts a horizontal line at a
specified row coordinate.
LineTan
Draws a tangent line for a specified expression at a
specified point. (This draws the tangent line only,
not the expression.)
LineVert or
PxlVert
Draws, erases, or inverts a vertical line at a
specified column coordinate.
Command Description
DrawFunc
Draws a specified expression.
DrawInv
Draws the inverse of a specified expression.
DrawParm
Draws a parametric equation using specified
expressions as its
x
and
y
components.
DrawPol
Draws a specified polar expression.
DrwCtour
Draws contours in 3D graphing mode.
Shade
Draws two expressions and shades the areas where
expression1
<
expression2
.
Drawing Lines and
Circles
Drawing
Expressions

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA