Texas Instruments -84 Plus, Manual Book

Page: 150 / 696

Chapter 5: Polar Graphing 147
Defining and Editing Polar Equations Defining and Editing Polar Equations Defining and Editing Polar Equations Defining and Editing Polar Equations
To define or edit a polar equation, follow the steps in Chapter 3 for defining a function or
editing a function. The independent variable in a polar equation is
q
. In Pol graphing
mode, you can enter the polar variable
q
in either of two ways.
• Press
„
.
• Press
ƒ
[
q
]
.
Selecting and Deselecting Polar Equations
Selecting and Deselecting Polar Equations Selecting and Deselecting Polar Equations
Selecting and Deselecting Polar Equations
The TI-84 Plus graphs only the selected polar equations. In the Y= editor, a polar
equation is selected when the
=
sign is highlighted. You may select any or all of the
equations.
To change the selection status, move the cursor onto the
=
sign, and then press
Í
.
Setting Window Variables
Setting Window Variables Setting Window Variables
Setting Window Variables
To display the window variable values, press
p
. These variables define the viewing
window. The values below are defaults for Pol graphing in Radian angle mode.
q
min=0
Smallest
q
value to evaluate
q
max=6.2831853
...
Largest
q
value to evaluate (2
p
)
q
step=.1308996
...
Increment between
q
values (
pà
24)
Xmin=
L
10
Smallest X value to be displayed