Tangent of the Double Folium
r = sin t sin 2t

See Also : 

• Construct Double Folium.

• Tangent of Double Folium.

• Osculating circle of Double Folium.

Related Page :

• from MathWorld : http://mathworld.wolfram.com/Bifolium.html

• Famous Curve Index : http://www-groups.dcs.st-and.ac.uk/~history/Curves/Double.html

• 動態幾何(邱瓊誼)

• 偉弘的動態幾何網頁

• 幾何學習天地(楊澤璿)