(adsbygoogle = window.adsbygoogle || []).push({}); expressing points on an ellipse given the (x,y) of the foci and the sum of the radii

Given the (x,y) of the 2 foci of an ellipse,

and the sum of the radii from the foci,

Is there an equation that will find the (x,y) of a point on the ellipse at a specified angle?

Is there an equation to find the (x,y) given one radius' length from a specified focus?

Thank you.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Expressing points on an ellipse given the (x,y) of the foci and the sum of the radi

**Physics Forums | Science Articles, Homework Help, Discussion**