This time we are graphing r = 0.2 θ in polar coordinates.

30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° 0 1 2 3 4

Graph of r = 2.5, a limacon.

Note the value of r is always `0.2` times the value of θ (of course, we are in radians).

Easy to understand math videos:
MathTutorDVD.com