Page B-9
The
CAT
function is used to activate the command catalog.
The
CLEAR
function clears the screen.
The
LN
function calculates the natural logarithm.
The
x
y
function calculates the
x
– th root of
y
.
The
Σ
function is used to enter summations (or the upper case Greek letter
sigma).
The
∂
function is used to calculate derivatives.
The
∫
function is used to calculate integrals.
The
LOG
function calculates the logarithm of base 10.
The
ARG
function calculates the argument of a complex number.
The
ENTRY
function is used to change entry mode in editing.
The
NUM.SLV
function launches the NUMerical SOLver menu.
The
TRIG
function activates the trigonometric substitution menu.
The
TIME
function activates the time menu.
The
ALG
function activates the algebra menu.
The STAT function activates the statistical operations menu.
The
UNITS
function activates the menu for units of measurement.
The
CMPLX
function activates the complex number functions menu.
The
LIB
function activates the library functions.
The
BASE
function activates the numeric base conversion menu.
The OFF key turns the calculator off, the
NUM
key produces a numeric
(or floating-point) value of an expression.
The
“ “
key enters a set of double-quotes used for entering text strings.
The
__
key enters an underscore.
The
<< >>
key enters the symbol for a program.
The
key enters an arrow representing an input in a program.
The
key enters a return character in programs or text strings.
The comma (
,
) key enters a comma.
The arrow keys, when combined with the right-shift key, move the cursor
to the farthest character in the direction of the key pressed.
ALPHA characters
The following sketch shows the characters associated with the different
calculator keys when the ALPHA
~
is activated. Notice that the
~
function is used mainly to enter the upper-case letters of the English alphabet