|01.||Polar coordinates, as opposed to Cartesian|
Where as a cartesian graph plots coordinates vertically as a function of the horizontal axis (x),
a polar graph plots coordinates projecting from the center around which the function rotates (theta).
Cartesian coordinates are a function of x. As a point rides the x axis, y coordinates returning from the function are plotted on the graph.
Polar coordinates are a function of theta. As theta eternally circles, coordinates indicating the point's distance from the center are plotted on the graph.
Theta is generally calculated in radians: Pi == 180o
A distance of 2Pi will draw a full circle; 360o