Operation Manual

Operating the TI
.
82 1-7
8201OPER.DOC TI-82, Chapter 1, English Bob Fedorisko Revised: 02/09/01 12:18 PM Printed:
02/09/01 12:35 PM Page 7 of 22
Entering a Number in Scientific Notation
1. Type the part of the number that precedes the exponent. This value can
be an expression.
2. Press
y
ã
EE
ä
.
E
appears in the display.
3. If the exponent is negative, press
Ì
and then type the exponent, which
can be one or two digits.
Entering a number in scientific notation does not cause the answers to be
displayed in scientific or engineering notation. The display format is
determined by the
MODE
settings (page 1
.
10) and the size of the number.
Functions
A function returns a value. For example,
÷
,
-
,
+
,
‡
, and
log
were the
functions in the previous example. In general, the names of functions on
the display begin with a lowercase letter. Some functions take more than
one argument, which is indicated by a
(
at the end of the name. For
example,
min(
requires arguments,
min(5,8)
.
Instructions
An instruction initiates an action. For example,
ClrDraw
is an instruction
that clears any drawn elements from a graph. Instructions cannot be used
in expressions. In general, the names of instructions begin with a capital
letter. Some instructions require more than one argument, which is
indicated by a
(
at the end of the name. For example,
Circle(
requires three
arguments,
Circle(0,0,5)
.
Interrupting a Calculation
While the busy indicator is displayed, indicating that a calculation or a
graph is in progress, you can press
É
to stop the calculation. (There may
be a delay.) Except in graphing, the
ERR:BREAK
screen is shown.
¦
To go to where the interruption occurred, select
Goto
.
¦
To return to the Home screen, select
Quit
.