I'm trying to develop a tool/demonstration for my Calculus II and III classes, showing different coordinate systems. I have one for rect. and polar, and another for rect., cylindrical, and spherical, but I've posted only the rect./polar one, as the problem I'm encountering in both seems to be the same.
The idea is that students can manipulate either the rectangular coordinates or polar coordinates, and the other will update dynamically. The point with the given coordinates is also displayed on the plane. When I manipulate x,y, or r, everything seems to work fine, but when I update theta, none of the other variables update dynamically, and the point doesn't move. I can't seem to figure out why. Any help would be much appreciated.
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