Mistake Master
Student view — seeing the site as a student does
Mistake Master · AP Precalculus · Unit 3 · Step-Through Animation

The Pen Is Driven by the Angle

You'll learnto plot a polar curve one point at a time before sweeping it.

A polar graph is swept rather than plotted. The angle turns counterclockwise while r says how far from the pole the pen should ride, so the wave on the right issues the instructions and the curve on the left carries them out. Twelve short steps; press Next for each one.

12 STEPS · 6 QUICK CHECKS · CIRCLES · ROSES · LIMAÇONS · NEGATIVE r · v3

the wave instructs · the pen draws
Before you start
What you're looking at
A polar grid, with the simple equation r = 2 about to be plotted on it.
The question
For each angle, how far from the pole does the pen ride?
Step 1 / 8