Calculator User Manual

Quick Start
9
00QWIKST.DOC TI-86, Quick Start, US English Bob Fedorisko Revised: 02/13/01 1:51 PM Printed: 02/13/01 2:59 PM Page 9 of 1400QWIKST.DOC TI-86, Quick Start, US English Bob Fedorisko Revised: 02/13/01 1:51 PM Printed: 02/13/01 2:59 PM Page 9 of 14

Select
¡
C
to designate Celsius as the unit
to which you want to convert.
&

Convert. The
¡
C equivalent of
L
4
¡
F is
displayed.
b
Storing an Unevaluated Expression to an Equation Variable

Enter the built-in equation variable
y1
.(:) - n
ã
Y
ä 1

Enter the equals sign (=). 1
ã
=
ä

Enter an expression in terms of
x
.

Store the expression.
5
D = 2 E
b
The next section shows how to graph the functions
y1=5(sin x)
and
y2=5(cos x)
.
Plotting Functions on the Graph Screen
The TI
-
86 plots four types of functions on the graph screen. To plot a graph, you must store
an unevaluated expression to a built-in equation variable.
Each activity in this section builds upon the activity that precedes it. You must start here
and perform the activities in the sequence in which they are presented. The first activity in
this section assumes you are continuing from the last activity in the previous section.
Displaying and Entering Functions in the Equation Editor

Display the
GRAPH
menu. (
continued
) 6
When storing to an equation
variable using
=
, enter the
equation variable first, then
=
,
and then the unevaluated
expression. This is the
opposite from the order for
storing to most other
variables on the TI
-
86.