Texas Instruments TI-89 Manual Book page 541

ZoomOut
CATALOG
ZoomOut
Displays the Graph screen, lets you set a
center point for a zoom out, and updates the
viewing window.
The magnitude of the zoom is dependent on
the
Zoom
mode, the magnitude is dependent on
, and
yFact
ZoomPrev
CATALOG
ZoomPrev
Displays the Graph screen, and updates the
viewing window with the settings in use
before the last zoom.
ZoomRcl
CATALOG
ZoomRcl
Displays the Graph screen, and updates the
viewing window using the settings stored
with the
ZoomSqr
CATALOG
ZoomSqr
Displays the Graph screen, adjusts the
window settings so that each pixel represents
an equal width and height in the coordinate
system, and updates the viewing window.
In
3D Graph
shortest two axes to be the same as the
longest axis.
524 Appendix A: Functions and Instructions
factors and . In 3D Graph
xFact yFact
.
zFact
instruction.
ZoomSto
mode, lengthens the
ZoomSqr
In function graphing mode:
1.25xù cos(x)! y1(x) ¸
ZoomStd:ZoomOut ¸
xFact ,
¸
In function graphing mode:
1.25xù cos(x)! y1(x) ¸
or
x y
ZoomStd ¸
"
ZoomSqr ¸
Done
Done