User manual

© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
A-4
Quick Reference to Keys
(Continued)
A
K
EY
F
UNCTION
H
Displays the following menu of functions.
nPr
Calculates the number of possible permutations.
nCr
Calculates the number of possible combinations.
!
Calculates the factorial.
RAND
Generates a random 10-digit real number between 0 and 1.
RANDI
Generates a random integer between 2 numbers that you
specify. Separate the 2 numbers with a comma.
% h
Recalls the stored values to the display.
% 
Displays the
RESET
menu.
RESET
:
N Y
Press
<
when
N
(no) is underlined to return to the previous screen
without resetting the calculator.
Press
<
when
Y
(yes) is underlined to reset the calculator. The
message
MEM CLEARED
is displayed.
Also, press
&
and
-
simultaneously to reset the calculator
immediately. No menu or message is displayed.
% k
Displays the following menu that lets you convert rectangular coordinates
(
c
,y) to polar coordinates (r,
q
) or vice versa.
R
4
Pr
Converts rectangular coordinate to polar coordinate r.
R
4
P
q
Converts rectangular coordinate to polar coordinate
q
.
P
4
R
c
Converts polar coordinate to rectangular coordinate
c
.
P
4
Ry
Converts polar coordinate to rectangular coordinate y.
% d
Displays the following numeric notation mode menu.
FLO
Restores standard mode (floating decimal).
SCI
Turns on scientific mode and displays results as a number
from 1 to 10 (1

n < 10) times 10 to an integer power.
ENG
Turns on engineering mode and displays results as a
number from 1 to 1000 (1

n < 1000) times 10 to an
integer power. The integer power is always a multiple of 3.