Operation Manual

Math, Angle, and Test Operations 2-3
8202MATH.DOC TI-82, Chapter 2, English Bob Fedorisko Revised: 02/09/01 12:20 PM Printed:
02/09/01 12:36 PM Page 3 of 16
Keyboard Math Operations
The most commonly used math functions are on the keyboard.
Using Lists with Functions
Functions that are valid for lists return a list calculated on an element-by-
element basis. If two lists are used in the same expression, they must be
the same length.
+ (Add), – (Subtract),
…
(Multiply),
à
(Divide)
+
(addition
Ã
),
–
(subtraction
¹
),
…
(multiplication
¯
), and
à
(division
¥
)
may be used with numbers, expressions, lists, or matrices (Chapter 10).
valueA
+
valueB
,
valueA
–
valueB
,
valueA
…
valueB
,
valueA
à
valueB
Trig Functions
The trigonometric functions may be used with numbers, expressions, or
lists. They are interpreted according to the current
Radian
/
Degree
MODE
setting. For example,
sin 30
in
Radian
MODE
returns
M
.9880316241
; in
Degree
MODE
it returns
.5
.
sin
value
,
cos
value
,
tan
value
sin
.
1
,
cos
.
1
, and
tan
.
1
are the inverse trig functions (arcsine, arccosine, and
arctangent).
sin
.
1
value
,
cos
.
1
value
,
tan
.
1
value
^
(Power),
2
(Square),
‡
(Square Root)
^
(power
›
),
2
(squared
¡
), and
‡
(square root
y
ã
‡
ä
) may be used with
numbers, expressions, lists, or matrices (Chapter 10).
value
^
power
,
value
2
,
‡
value
Note: Raising a negative number to a noninteger power can result in a
complex number, which returns an error.
.
1
(Inverse)
.
1
(inverse
—
) may be used with numbers, expressions, lists, or matrices
(Chapter 10).The multiplicative inverse is the equivalent of the reciprocal,
1
à
x.
value
.
1