Polar and spherical plots (13 graphics)
Polar plots of the function .
Staggered polar plots of the function and . increases vertically from 1 to 6.
Spherical plot of the functions and . The coloring is according to and .
. 
and 
. 
increases vertically from 1 to 6. 
and 
. The coloring is according to 
and 
.
