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with(plots):
plot3d(cos(x*y), x=-3..3, y=-3..3, axes=framed):
plot3d(cos(x*y), x=-3..3, y=-3..3, axes=framed, style=hidden,
color=blue):
plot3d(1/(x^2+y^2), x=-1..1, y=-1..1, view=0..10, grid=[25,
25], style=hidden,color=blue, axes=framed);
spacecurve([t*cos(2*Pi*t), t*sin(2*Pi*t), 2+t,t=0..10],
numpoints=400, color=red, thickness=2, axes=framed);
plot3d([r*cos(phi), r*sin(phi), phi], r=0..1, phi=0..6*Pi,
grid=[15,45], style=hidden, orientation=[55,70], axes=framed);
implicitplot3d( x^3 + y^3 + z^3 + 1 = (x + y +z+1)^3,x=-2..2,
y=-2..2,z=-2..2,grid=[13,13,13], style=patchnogrid, axes=
framed);
s:=sphereplot(1, theta=0..2*Pi, phi=0..Pi, style=patch,
scaling=constrained):
c:=cylinderplot(1/2, theta=0..2*Pi, z=-2..2, style=patch,
scaling=constrained):
display3d({s,c}, axes=none, scaling=constrained):
U:=log(sqrt((x+1)^2+y^2)) + log(sqrt((x-1)^2+y^2)) + log(sqrt(
(y+1)^2+x^2)) + log(sqrt((y-1)^2+x^2)):
contourplot(U, x=-3/2..3/2, y=-3/2..3/2, contours=30, grid=
[50,50], color=black):
plot3d(20*exp(-x^2-y^2)-10,x=0..2,y=-3..3, style=patchcontour,
contours=15, axes=framed):
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