HP Prime Graphing NW280AAABA manual Getting started with the Polar app, Open the Polar app

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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 θ, the angle a segment from the point to the origin makes with the polar axis. Such equations take the form r = f(θ) .

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 5πcos(θ/2)cos(θ)2.

Open the Polar app

1.Open the Polar app:

ISelect Polar

The app opens in Symbolic view.

Define the function

There are 10 fields for defining polar functions. These are labelled R1(θ) through R9(θ) and R0(θ).

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.

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