Parametric Graphing
336
Be careful when using implied multiplication with
t
. For example:
Note:
When using
t
, be sure implied multiplication is valid for your situation. You can use
the
Define
command from the Home screen (see the
Technical Reference
module) to
define functions and equations for any graphing mode, regardless of the current mode.
The Y= Editor maintains an independent function list for each
Graph
mode setting. For
example, suppose:
•
In FUNCTION graphing mode, you define a set of
y(x)
functions. You change to
PARAMETRIC graphing mode and define a set of x and
y
components.
•
When you return to FUNCTION graphing mode, your
y(x)
functions are still defined
in the Y= Editor. When you return to PARAMETRIC graphing mode, your x and y
components are still defined.
Selecting Parametric Equations
To graph a parametric equation, select either its x or y component or both. When you
enter or edit a component, it is selected automatically.
Selecting x and y components separately can be useful for tables as described in
Tables
.
With multiple parametric equations, you can select and compare all the x components or
all the y components.
Enter:
Instead of:
Because:
t
ù
cos(60)
tcos(60)
tcos
is interpreted as a user-defined function
called
tcos
, not as implied multiplication.
In most cases, this refers to a nonexistent
function. So the TI-89 Titanium simply returns
the function name, not a number.
Summary of Contents for Titanium TI-89
Page 9: ...Getting Started 6 TI 89 Titanium keys Ë Ì Í Ê ...
Page 34: ...Getting Started 31 2 or D 2 B u s i n e s s D B D B Press Result ...
Page 43: ...Getting Started 40 3 0 D B D D B D Press Result ...
Page 44: ...Getting Started 41 D 2 0 0 2 D B Scroll down to October and press Press Result ...
Page 58: ...Getting Started 55 Example Set split screen mode to TOP BOTTOM Press Result 3 B D ...
Page 70: ...Getting Started 67 ...
Page 175: ...Operating the Calculator 172 From the Keyboard ...
Page 456: ...Tables 453 ...
Page 527: ...Data Matrix Editor 524 ...
