Notes About Defining Function Equations - Texas Instruments TI-86 Manual Book

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Chapter 5: Function Graphing
You can edit expressions you
inserted using Rcl .

Notes about Defining Function Equations

You can include functions, variables, constants, matrices, matrix elements, vectors,
vector elements, lists, list elements, complex values, or other equations in the equation.
If you include matrices, vectors, or complex values, the equation must evaluate to a real
number at each point.
You can include another defined function in an equation. For example, given
and , the function
y2=4+y1
To enter a function name, select
appropriate number.
To insert the contents of an equation variable, use
equation variable at the
character keys.
To select all functions from the home screen or in the program editor, select
(or enter the individual characters) and press b.
the
CATALOG
To select specific functions from the home screen or in the program editor, select
from the (or enter the individual characters), enter the number of each
CATALOG
function, and press b. For example, to select
To deselect functions from the home screen or in the program editor, use
same way you use
FnOn
When a function evaluates to a non-real number, the value is not plotted on the graph;
no error is returned.
would equal 4 plus the sine of x.
y2
from the equation editor menu, and then enter the
y
prompt, use the ALPHA keys, alpha keys, and other
Rcl
to select functions.
(Chapter 1). To enter the
RCL
, , and , enter
y1 y3 y5 FnOn 1,3,5
y1=sin x
from
FnOn
FnOn
.
the
FnOff