thanks so much for your help.

the first code u gave worked, but the 2nd one didn't. but it's okay. i got the first one correct, but

can i plot my function in densityplot? im not sure if that's what i have to use.. i want my plot to be in 2-dimensional in polar coordinates but my f(r,theta) will only be described by proper coloring/hues.. how can i plot it?