Cylindrical and Spherical Polar Coordinates

Cylindrical Coordinates and Spherical Polar Coordinates can be very useful for solving math problems in three dimensions when Cartesian Coordinates fail. Here I show you how to find all the basic formulas for converting between these three coordinate systems. All other formulas related to Cylindrical and Spherical Polar Coordinates ultimately derive from these.

Differential Equations – Basic Terminology

A few basic differential equations (DE) terms. The examples are all ordinary DEs, but much of this applies to partial DEs and systems of DEs as well.