WOLFRAM|DEMONSTRATIONS PROJECT

Tangents to a Rotating Ellipse

​
semimajor axis a
130.
eccentricity e
0.75
tangent
top
bottom
both
rotate ellipse by θ
0.
This Demonstration plots the tangents and the locus of the points of tangency to a rotating ellipse starting from a point on the
x
axis that you can drag along the axis.