Graphing Spherical Coordinates in GeoGebra 3D (Part 3): An Ellipsoid using Scalar Function

In this video we use GeoGebra 3D from geogebra.org to graph an ellipsoid with equation x^2 + y^2 + 9z^2 = 9 in rectangular and rho = 3/sqrt(1+8cos(phi)^2) in spherical (See where equation comes from: https://youtu.be/SNRJJEGLCu8). We create a function for rho and then use the surface command with parameters for theta and phi (I use t and v). After getting the graph to work we then create sliders for the upper bounds of the parameters and play around with it a bit. Playing around with this kind of thing on GeoGebra is the best way I've found to really learn what's going on.

Видео Graphing Spherical Coordinates in GeoGebra 3D (Part 3): An Ellipsoid using Scalar Function канала turksvids