> | restart; |
> | with(plots): |
> | f:= (x,y)->x*y^2 + 2*y + x^2*y; |
> | plot3d(f(x,y), x=0..2, y=0..1, axes=boxed, title="(14.8) Example 3"); |
> | g:=(r,phi)->r*(1-r)*sin(phi) + 2/3*cos(2*phi); |
> | plot3d(g(r,phi), r=0..1, phi=0..2*Pi, axes=boxed, title = "Example 4"); |
> | plot(g(0.5,phi), phi=0..2*Pi); |
> |