Texas Instruments TI-89 Manual Book page 458

DrwCtour
CATALOG
DrwCtour expression
DrwCtour list
Draws contours on the current 3D graph at
the z values specified by
The 3D graphing mode must already be set.
DrwCtour
style to CONTOUR LEVELS
By default, the graph automatically contains
the number of equally spaced contours
specified by the
DrwCtour
defaults.
To turn off the default contours, set
to zero, either by using the Window screen or
by storing 0 to the
í
^
TI-89:
mantissaEexponent
Enters a number in scientific notation. The
number is interpreted as
10 exponent .
Hint: If you want to enter a power of 10
without causing a decimal value result, use
10^
integer
e^()
¥ s
TI-89:
e^(expression1)
Returns e raised to the
Note: On the TI-89, pressing ¥ s to
display e^( is different from pressing
j
[E ] .
to display e^ is different from accessing the
character e from the QWERTY keyboard.
You can enter a complex number in
form. However, use this form in Radian angle
mode only; it causes a
angle mode.
e^(list1) list
Returns e raised to the power of each
element in
expression
automatically sets the graph format
.
Window variable.
ncontour
draws contours in addition to the
system variable.
ncontour
key TI-92 Plus: 2 ^ key
mantissa
.
TI-92 Plus: 2 s key
key
expression
expression1
On the TI-92 Plus, pressing 2s
Domain error
.
list1
In 3D graphing mode:
(1/5)x^2+(1/5)y^2ì 10!z1(x,y)
¸
or .
list
L10!xmin:10!xmax ¸
L10!ymin:10!ymax ¸
L10!zmin:10!zmax ¸
0!ncontour ¸
DrwCtour {L9,L4.5,L3,0,4.5,9}
¸
ncontour
Use the cursor to change the viewing
angle. Press 0 (zero) to return to the
original view.
To toggle between different graph
format styles, press:
Í
TI-89:
Press X, Y, or Z to look down the
corresponding axis.
2.3í 4 ¸
2.3í 9+4.1í 15 ¸
×
3ù 10^4 ¸
e^(1) ¸
power.
e^(1.) ¸
e^(3)^2 ¸
i q
e polar
r
in Degree
e^({1,1.,0,.5}) ¸
Appendix A: Functions and Instructions
TI-92 Plus : F
23000.
4.1í 15
30000
2.718...
{e 2.718... 1 1.648...}
Done
10
10
10
0
e
9
e
441