Casio FX-180PA Manual page 9

xr Power key
Press any number .r. OO,
any number v and Ø to raise .r to the v power.
xy
Root key
Press any number x,
~
xb, any number v and Ø to display the •i root of .r.
Rectangular to polar key
To convert displayed rectangular coordinates to polar coordinates, press jn E .
~
Polar to rectangular key
To convert displayed polar coordinates to rectangular coordinates, press ®
®.
P4 Percent key
To find a percent of a displayed number, press the correct numbers for the percent and
~
~
Press
Random number key
uxc to generate a random number between 0.000 and 0.999.
Permutation key
Press ® to perform permutation calculations.
f
Combination key
Press ®© to perform combination calculations.
Statistical keys (Use in the SD or LR mode only)
Ei Statistical register clear key
Before beginning statistical calculations, press
',
DEE
Data entry and delete keys
In the SD and LR modes, enter data by pressing the correct numbers and
after each
piece of data. If you enter incorrect data and don't notice your mistake until after you have
pressed
, enter the same incorrect data and then press ® to delete the data.
xncl to clear the statistical egisters.
~
® Regression analysis data entry key
In the LR mode, press ®
after entering the first part of your data pair.
O
r
keys
Press
® and
p
(or
~ =
Arithmetic mean and sum of square value
®) in the SD or LR mode to get the arithmetic mean (.c or i ) of your
data. Press
® (or
® ( in the SD or LR mode to display the sum of the square
value ( x 2 or =y 2 ) of your data.
xaa, Ql
1 and
of value keys
Press ® l or
or van). Press ~
=
Iz, =
~Y Population standard deviation and sum
ra ) in the LR mode to display the population standard deviation) rUn
I l (or
)om) in the LR mode to display the sum of the value (£r or `_ i').
.8.
~