Texas Instruments TI-89 Manual Book page 497

PlotsOff
CATALOG
PlotsOff [1] [, 2] [, 3] ... [, 9]
Turns off the specified plots for graphing.
When in 2-graph mode, only affects the active
graph.
If no parameters, then turns off all plots.
PlotsOn
CATALOG
PlotsOn [1] [, 2] [, 3] ... [, 9]
Turns on the specified plots for graphing.
When in 2-graph mode, only affects the active
graph.
If you do not include any arguments, turns on
all plots.
4Polar
MATH/Matrix/Vector ops menu
vector 4Polar
Displays
vector must be of dimension 2 and can be a
row or a column.
Note: 4Polar
not a conversion function. You can use it
only at the end of an entry line, and it does
not update
Note: See also 4
complexValue 4Polar
Displays
Degree angle mode returns (rq).
Radian angle mode returns re
complexValue
However, an re
Degree angle mode.
Note: You must use the parentheses for an
(rq) polar entry.
polyEval()
MATH/List menu
polyEval(list1, expression1)
polyEval(list1, list2)
Interprets the first argument as the
coefficient of a descending-degree
polynomial, and returns the polynomial
evaluated for the value of the second
argument.
480 Appendix A: Functions and Instructions
in polar form [r q]. The
vector
is a display-format instruction,
.
ans
.
Rect
in polar form.
complexVector
iq
can have any complex form.
iq
entry causes an error in
expression
expression
PlotsOff 1,2,5 ¸
PlotsOff ¸
PlotsOn 2,4,5 ¸
PlotsOn ¸
[1,3.] 4Polar ¸
[x,y] 4Polar ¸
In Radian angle mode:
3+4i 4Polar ¸
(4p/3)4Polar ¸
.
In Degree angle mode:
3+4i 4Polar ¸(590ì tanê(3/4))
polyEval({a,b,c},x) ¸
polyEval({1,2,3,4},2) ¸
polyEval({1,2,3,4},{2,ë 7})
¸
Done
Done
Done
Done
p
( ì tanê(3/4))
i
ø ø5
e
2
iøp
ø4
e
3
aø xñ +bø x+c
26
{26 ë 262}