Texas Instruments TI-89 Titanium Short User Manual page 207

limit()
there are unique limits that it cannot determine. If
expression1
than
var
obtain a more concise result.
Limits can be very sensitive to rounding error.
When possible, avoid the
Exact/Approx
when computing limits. Otherwise, limits that
should be zero or have infinite magnitude
probably will not, and limits that should have
finite non-zero magnitude might not.
Line
CATALOG
xStart yStart
Line ,
Displays the Graph screen and draws, erases, or
inverts a line segment between the window
coordinates (
including both endpoints.
If
drawMode
If
drawMode
If
drawMode
off to on (inverts pixels along the line).
Note: Regraphing erases all drawn items. See
also
PxlLine
LineHorz
CATALOG
y
LineHorz [,
Displays the Graph screen and draws, erases, or
inverts a horizontal line at window position
If
drawMode
If
drawMode
If
drawMode
off to on (inverts pixels along the line).
Note: Regraphing erases all drawn items. See
also
PxlHorz
LineTan
CATALOG
expression1
LineTan
Displays the Graph screen and draws a line
tangent to
expression1
function, where
independent variable, and
value of the point that is tangent.
Note: In the example shown,
graphed separately.
expression1.
Appendix A: Functions and Instructions
uses methods such as L'Hopital's rule, so
contains undefined variables other
, you might have to constrain them to
APPROX
mode and approximate numbers
xEnd yEnd drawMode
, , [,
xStart , yStart ) and (
= 1, draws the line (default).
= 0, turns off the line.
= ë 1, turns a line that is on to off or
.
drawMode
]
= 1, draws the line (default).
= 0, turns off the line.
= ë 1, turns a line that is on to off or
.
expression2
,
at the point specified.
expression1
is an expression or the name of a
is assumed to be the
x
expression2
does not graph
LineTan
limit(a^x,x,ˆ) ¸
limit(a^x,x,ˆ)|a>1 ¸
limit(a^x,x,ˆ)|a>0 and a<1
¸
setting of the
In the
]
erase it.
Line 0,0,6,9 ¸
xEnd , yEnd ),
@
H
Line 0,0,6,9,0 ¸
In a
LineHorz 2.5 ¸
.
y
In function graphing mode and a
window:
Graph cos(x)
@
H
is the
x
LineTan cos(x),p/4 ¸
is
expression1
window, draw a line and then
ZoomStd
"
¥ "
window:
ZoomStd
"
¥ "
undef
ˆ
0
ZoomTrig
201