I don’t always prove that the unified theorem for conics is applicable for ellipses but when I do I usually go over some EXTENSIVE algebra in the derivation ;)
View Video Notes: https://steemit.com/mathematics/@mes/conics-in-polar-coordinates-unified-theorem-ellipse-proof
A cone is more difficult for me hihi; the cylinder I find much easier for such maths. This just tells me HOW far I am in your world of numbers. Stay on course, I am always your fan here.
Haha thanks! You can always keep up by watching my math videos!! =D