Chapter 1: Operating the TI-84 Plus Silver Edition
12
Entering an Expression
To create an expression, you enter numbers, variables, and functions using the keyboard and
menus. An expression is completed when you press
Í
, regardless of the cursor location. The
entire expression is evaluated according to Equation Operating System (EOS™) rules, and the
answer is displayed according to the mode setting for
Answer
.
Most TI-84 Plus functions and operations are symbols comprising several characters. You must
enter the symbol from the keyboard or a menu; do not spell it out. For example, to calculate the log
of 45, you must press
«
45
. Do not enter the letters
L
,
O
, and
G
. If you enter
LOG
, the TI-84 Plus
interprets the entry as implied multiplication of the variables
L
,
O
, and
G
.
Calculate 3.76
P
(
L
7.9 +
‡
5) + 2 log 45.
Multiple Entries on a Line
To enter two or more expressions or instructions on a line, separate them with colons (
ƒ
[
:
]).
All instructions are stored together in last entry (ENTRY).
Entering a Number in Scientific Notation
1. Enter the part of the number that precedes the exponent. This value can be an expression.
2. Press
y D
.
â
is pasted to the cursor location.
3. Enter the exponent, which can be one or two digits.
Note
: If the exponent is negative, press
Ì
, and then enter the exponent.
When you enter a number in scientific notation, the TI-84 Plus does not automatically display
answers in scientific or engineering notation. The mode settings and the size of the number
determine the display format.
Functions
A function returns a value. For example,
÷
,
L
,
+
,
‡
, and
log(
are the functions in the example on the
previous page. In general, the first letter of each function is lowercase on the TI-84 Plus. Most
functions take at least one argument, as indicated by an open parenthesis following the name. For
example,
sin(
requires one argument,
sin(
value
)
.
3
Ë
76
¥ £ Ì
7
Ë
9
Ã
y C
5
¤ ¤ Ã
2
«
45
¤
Í
MathPrint™
Classic
