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Rose
r = sin(nθ) or r = cos(nθ)
Same number of petals
odd n-value
Double number of petals
even n-value
Limaçons and cardioids
r = a + bsinθ or r = a + bcosθ
a/b < 1
limacon with inner loop
a/b = 1
cardioid (heart-shaped)
1 < a/b < 2
dimpled limacon
a/b ≥ 2
convex limacon