Texas Instruments PLUS TI-89 - Manual (Page 497)

480 Appendix A: Functions and Instructions
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 480 of 132
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.
PlotsOff 1,2,5 ¸ Done
PlotsOff ¸ Done
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.
PlotsOn 2,4,5 ¸ Done
PlotsOn ¸ Done
4 Polar MATH/Matrix/Vector ops menu
vector 4 Polar
Displays vector in polar form [r q]. The
vector must be of dimension 2 and can be a
row or a column.
Note : 4 Polar is a display-format instruction,
not a conversion function. You can use it
only at the end of an entry line, and it does
not update
ans .
Note: See also 4 Rect .
[1,3.] 4Polar ¸
[x,y] 4Polar ¸
complexValue 4 Polar
Displays complexVector in polar form.
•
Degree angle mode returns (r q).
•
Radian angle mode returns re i q .
complexValue can have any complex form.
However, an re i q entry causes an error in
Degree angle mode.
Note : You must use the parentheses for an
(r q) polar entry.
In Radian angle mode:
3+4i 4Polar ¸ e i ø
(
p
2
ì tanê(3/4))
ø5
(4 p/3)4Polar ¸ e
iø p
3 ø4
In Degree angle mode:
3+4i 4Polar ¸(590ì tanê(3/4))
polyEval() MATH/List menu
polyEval( list1 , expression1 ) ⇒ expression
polyEval( list1 , list2 ) ⇒ expression
Interprets the first argument as the
coefficient of a descending-degree
polynomial, and returns the polynomial
evaluated for the value of the second
argument.
polyEval({a,b,c},x) ¸
aø xñ +bø x+c
polyEval({1,2,3,4},2) ¸ 26
polyEval({1,2,3,4},{2,л 7})
¸ {26 л 262}