HP Prime Graphing Calculator - Manual (Page 279)

Polar app 275
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Polar app
The Polar app enables you to explore polar equations.
Polar equations are equations in which r—the distance a
point is from the origin: (0,0)—is defined in terms of , the
angle a segment from the point to the origin makes with
the polar axis. Such equations take the form
.
Getting started with the Polar app
The Polar app uses the six standard app views described
in chapter 5, “An introduction to HP apps”, beginning on
page 69. That chapter also describes the menu buttons
used in the Polar app.
Throughout this chapter, we will explore the expression
5cos(/2)cos()
2 .
Open the
Polar app
1. Open the Polar
app:
I Select Polar
The app opens in
Symbolic view.
Define the
function
There are 10 fields for defining polar functions. These are
labelled R1() through R9() and R0().
2. Highlight the field you want to use, either by tapping
on it or scrolling to it. If you are entering a new
function, just start typing. If you are editing an
existing function, tap
and make your changes.
When you have finished defining or changing the
function, press
E .
r f    =