Ok, I've been trying to work this out for a couple of hours now and I'm completely stumped. Not even Google was helping much.
The question is:
Find and Sketch the level curves of the scalar field T(x,y) = (x +y)/(x2 + y2) for T = -1, -0.5, 0, 0.5, 1[/size]
I know that I should equate the...