The quadrifolium (also known as four-leaved clover) is a type of rose curve with an angular frequency of 2. It has the polar equation: r = a cos ( 2 θ ) , {\displaystyle r=a\cos(2\theta ),\,} with corresponding algebraic equation ( x 2 + y 2 ) 3 = a 2 ( x 2 − y 2 ) 2 .
The quadrifolium (also known as four-leaved clover) is a type of rose curve with an angular frequency of 2. It has the polar equation: r = a cos ( 2 θ ) , {\displaystyle r=a\cos(2\theta ),\,} with corresponding algebraic equation ( x 2 + y 2 ) 3 = a 2 ( x 2 − y 2 ) 2 .
Source: Wikipedia "Quadrifolium" · CC BY-SA 4.0
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