Graphing Spherical Coordinates in GeoGebra 3D (Part 1): A Sphere

In this video we use GeoGebra 3D from geogebra.org to graph a cone with equation x^2 + y^2 + z^2 = 9 in rectangular and rho = 3 in spherical. Video of finding the equation here: https://youtu.be/BYCdO2vHp00
We 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.