Tangent of the Cross Curve

x = a sec t   , y = b csc t

Reference :

• The cross curve was first conceived by Terquem in 1847.

• J. Dennis Lawrence, A Catalog of Special Plane Curves, pp. 127, 130-131.

See Also : 

• Construct Cross Curve.

• Tangent of Cross Curve.

• Osculating circle of Cross Curve.

Related Page :

• from Math World : http://mathworld.wolfram.com/Cruciform.html

• 數學天地(曾俊榮) : Crose Curve

• 動態幾何(邱瓊誼)

• 幾何學習天地(楊澤璿)