How to Use Derivation of the Law of Cosines
TL;DR: Wondering where the Law of Cosines actually comes from? Drop an altitude inside a general triangle, splitting it into two right triangles, then apply the Pythagorean theorem twice and do a bit of algebra cleanup. Out pops c squared equals a squared plus b squared minus 2ab times cosine of C. The point isn’t […]
What Are the Applications of Polar Coordinates?
Polar coordinates describe a point by distance and angle rather than by x and y, which makes circles, spirals and anything with rotational symmetry far simpler to write down. Below: where polar form is used in navigation, physics and graphing, and how to work with it step by step.
