DEFINITION:

1. Graph of the implicit equation x^2 + y^2 = 1; Not a function - divided into +(Green)/-(Blue) the square root of (1-x^2).

   

2. Graph of the Polar equation r=1 for Theta (angles) 0 radians to 2*Pi radians,

   

3. Graph on the complex plane of
   1. (-1)^x, x from 0 to 2; ; Blue.
   2. (I)^x, x from 0 to 4; ; Green.
   3. (-I)^x, x from 0 to 4; ; Purple.