Texas Instruments TI-84 - Manual (Page 150)

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.
qmin=0 Smallest q value to evaluate
qmax=6.2831853...
Largest
q
value to evaluate (2
p
)
qstep=.1308996... Increment between q values ( pà 24)
Xmin=
L10 Smallest X value to be displayed