Polar Coordinates - Basic Introduction

This Precalculus video tutorial provides a basic introduction into polar coordinates.  It explains how to convert polar coordinates to rectangular coordinates and how to graph polar coordinates by plotting points using the radius of a circle and the angle measured counter clockwise from the positive x axis.  In addition, it explains how to convert rectangular coordinates to polar coordinates and how to provide multiple representation of polar coordinates using negative r values / radius and negative angles.  This video contains plenty of examples and practice problems.