Differences In Polar And Function Graphing - Texas Instruments TI-89 Manual Book

Differences in Polar and Function Graphing

Setting the
Graph Mode
Defining Polar
Equations on the
Y= Editor
Tip: You can use the Define
command from the Home
screen (see Appendix A) to
define functions and
equations for any graphing
mode, regardless of the
current mode.
Selecting the
Display Style
136 Chapter 8: Polar Graphing
This chapter assumes that you already know how to graph y(x)
functions as described in Chapter 6: Basic Function Graphing.
This section describes the differences that apply to polar
equations.
Use 3 to set
Graph = POLAR
Window variables. The Y= Editor and the Window Editor let you
enter information for the current
You should also set the
you want to use for q.
The Y= Editor maintains an independent function list for each
mode setting. For example, suppose:
¦
In graphing mode, you define a set of
FUNCTION
You change to
POLAR
equations.
¦
When you return to
are still defined in the Y= Editor. When you return to
graphing mode, your
The Above and Below styles are not available for polar equations and
are dimmed on the Y= Editor's
before you define equations or set
mode setting only.
Graph
Angle mode to the units (
graphing mode and define a set of
FUNCTION graphing mode, your
equations are still defined.
r(q)
toolbar menu.
Style
RADIAN or DEGREE )
You can define polar
equations for r1(q)
through r99(q).
Graph
functions.
y(x)
r(q)
y(x) functions
POLAR