• Elliptical helix
  Elliptical helix in space with a point on it
• Tangent vector as a limit
  Animation to illustrate the limiting process involved in the definition of the derivative
• Tangent vector as a limit (Quicktime format)
  Animation to illustrate the limiting process involved in the definition of the derivative: control h using the slider
• The tangent vector at the point
  The derivative vector that results from the above two animations
• Tangent vectors from the derivative
  The derivative of the elliptical helix as another vector-valued function.