Using Functions In Expressions; Using An Instruction; Entering Functions, Instructions, And Operators - Texas Instruments TI-86 Manual Book

In this guidebook, optional
arguments are shown in
brackets ( ã and ä ) . Do not
include these brackets when
you enter the arguments.
The A to Z Reference
describes all TI-86 functions
and instructions, including
their required and optional
arguments.
In the , to move to
CATALOG
the first item beginning with a
letter, press that letter (as in
ã L ä in the example).

Using Functions in Expressions

A function returns a value. Some examples of functions are
functions, you usually must enter one or more valid arguments.
When this guidebook describes the syntax of a function or instruction, each argument is in
italics. For example:
sin
measurement (or an expression that resolves to angle). For functions or instructions with
more than one argument, you must separate each argument from the other with a comma.
Some functions require the arguments to be in parentheses. When you are unsure of the
evaluation order, use parentheses to clarify a function's place within an expression.

Using an Instruction

An instruction initiates an action. For example,
clears all drawn elements from a graph. You cannot use an instruction in an expression.
Generally, the first letter of each instruction name is uppercase on the TI-86. Some
instructions take more than one argument, as indicated by an open parenthesis (
end of the name. For example,

Entering Functions, Instructions, and Operators

You can enter a function, instruction, or operator in any of three ways (
Paste it to the cursor location from the keyboard or a menu (<
Paste it to the cursor location from the
Enter it letter by letter ( - n 1
As you can see in the example, using the built-in function or instruction typically is easier.
angle. Press = to enter
ClDrw
requires three arguments,
Circl(
CATALOG
ãLä ãOä ãGä
Chapter 1: Operating the TI-86
L ‡
, , , , and
÷ +
, and then enter a valid angle
sin
is an instruction that, when executed,
x y radius
Circl( , ,
log 45
).
45
(- w & ã
L
¤ 1 1
45
25
. To use
log
) at the
(
.
)
, for example).
ä & & b
).
45
).