Operation Manual
2-4 Math, Angle, and Test Operations
8202MATH.DOC TI-82, Chapter 2, English Bob Fedorisko Revised: 02/09/01 12:20 PM Printed:
02/09/01 12:36 PM Page 4 of 16
log, 10^, ln
log
(logarithm
«
),
10^
(power of ten
y
ã
10
x
ä
), and
ln
(natural log
y
ã
ln
ä
) may be used with a number, expression, or list.
log
value
,
10^
power
,
ln
value
e^
e^
(exponential
y
ã
e
x
ä
) may be used with a number, expression, or list.
e^
returns the constant e raised to a power.
e^1
returns the value of the
constant e.
e^
power
M
(Negation)
M
(negation
Ì
) returns the negative of a number, expression, list, or matrix
(Chapter 10). The narrow negation symbol (
M
) distinguishes negation from
the subtraction or minus
¹
(
N
).
M
value
EOS rules (Chapter 1) determine when negation is evaluated. For example,
M
A
2
returns a negative number (squaring is evaluated before negation
according to EOS rules). Use parentheses to square a negated number,
(
M
A)
2
.
abs
abs
(absolute value) returns the absolute value of a number, expression,
list, or matrix (Chapter 10).
abs
value
p
(Pi)
Pi is stored as a constant in the TI
.
82. Press
y
ã
p
ä
to copy the symbol
p
to
the cursor location. The number 3.1415926535898 is used internally in
calculations.