Chapter 5: Polar Graphing
97
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(B
q
) 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=2
p
and
defines the window, rather than the pixels, as
square.
4. Press
p
to display the window variables.
Press
†
4
y B
to increase the value of
q
max
to
4
p
.
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(B
q
)
. Observe how the new values affect
the graph.
