Description

together with a patch indicating the tangent plane at a point. (You choose the point.) Include coordinate axes, the surface, a small sphere at the location of your point and the tangent plane. Also draw a set of 3 unit vectors in the normal direction and in the direction of the vectors h1, 0, fxi and h0, 1, fyi. If your plot is saved as a variable (say p) then you can save a static image of the 3-d plot using the save image command. Look up the help on that command by typing p.save image? in a cell.