Texas Instruments TI-80 User Manual - Page 52

Keyboard Math Operations

Page 52 highlights

Keyboard Math Operations The most commonly used math functions are on the keyboard. The keyboard math operations can be used with decimal numbers, fractions (except as noted), expressions, and lists. + (Add) - (Subtract) × (Multiply) à (Divide) The basic arithmetic functions are: addition «, subtraction |, multiplication p, and division e. Each argument for these functions can be a list. valueA+valueB, valueAìvalueB, valueA×valueB, valueAàvalueB Trig Functions The trigonometric functions are interpreted according to the current RADIAN/DEGREE mode setting. (Refer to page 1-9 for instructions on changing the mode setting.) For example, SIN 30 in RADIAN mode returns L.9880316241; in DEGREE mode, it returns .5. Each argument for the trigonometric functions may be a list. SIN value, COS value, TAN value SINê, COSê, and TANê are the inverse trig functions (arcsine, arccosine, and arctangent). SINê value, COSê value, TANê value RADIAN Mode ê (Inverse) ê (inverse, V) may be used with numbers, expressions, or lists. The multiplicative inverse is the equivalent of the reciprocal, 1àx. valueê 2-4 Math, Angle, and Test Operations

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2-4
Math, Angle, and Test Operations
The most commonly used math functions are on the keyboard. The keyboard
math operations can be used with decimal numbers, fractions (except as noted),
expressions, and lists.
The basic arithmetic functions are: addition
«
, subtraction
|
,
multiplication
p
, and division
e
. Each argument for these
functions can be a list.
valueA
+
valueB
,
valueA
ì
valueB
,
valueA
×
valueB
,
valueA
à
valueB
The trigonometric functions are interpreted according to the
current
RADIAN
/
DEGREE
mode setting. (Refer to page 1
-
9 for
instructions on changing the mode setting.) For example,
SIN 30
in
RADIAN
mode returns
L
.9880316241
; in
DEGREE
mode, it returns
.5
. Each argument for the trigonometric
functions may be a list.
SIN
value
,
COS
value
,
TAN
value
SIN
ê
,
COS
ê
, and
TAN
ê
are the inverse trig functions (arcsine,
arccosine, and arctangent).
SIN
ê
value
,
COS
ê
value
,
TAN
ê
value
RADIAN Mode
ê
(inverse,
V
) may be used with numbers, expressions, or
lists. The multiplicative inverse is the equivalent of the
reciprocal, 1
à
x.
value
ê
Keyboard Math Operations
+
(Add)
(Subtract)
×
(Multiply)
à
(Divide)
Trig Functions
ê
(Inverse)