Operation Manual

Chapter 5: Polar Graphing 101
Chapter 5:
Polar Graphing
Getting Started: Polar Rose
Getting Started is a fast-paced introduction. Read the chapter for details.
The polar equation R=Asin(Bq) graphs a rose. Graph the rose for A=8 and B=2.5, and then explore the
appearance of the rose for other values of A and B.
1. Press z to display the
MODE screen. Press
†††~~Í to select Pol graphing mode. Select the
defaults (the options on the left) for the other mode
settings.
2. Press o to display the polar Y= editor. Press 8 ˜ 2.5
„ ¤ Í to define
r1.
3. Press q 6 to select 6:ZStandard and graph the equation
in the standard viewing window. The graph shows only five
petals of the rose, and the rose does not appear to be
symmetrical. This is because the standard window sets
q
max=2p and defines the window, rather than the pixels, as
square.
4. Press p to display the window variables. Press
† 4 yB to increase the value of qmax to 4p.
5. Press q
5 to select 5:ZSquare and plot the graph.
6. Repeat steps 2 through 5 with new values for the variables
A and B in the polar equation r1=Asin(Bq). Observe how
the new values affect the graph.