Error, missing operator or `;`
> | x:=(2+sin(v))*cos(u); y:=(2+sin(v))*sin(u); z:=cos(v); |
> | plot3d([x,y,z], u=0..2*Pi, v=0..2*Pi, grid=[30,30], scaling=constrained, axes=boxed, title="Torus example"); |
> | a:=(2+exp(-u)*sin(v))*cos(u); b:=(2+exp(-u)*sin(v))*sin(u); c:=u+exp(-u)*cos(v); |
> | plot3d([a,b,c], u=0..2*Pi, v=0..2*Pi, grid=[30,30]); |
> |
> | x1:=3/sqrt(2)*sin(v)*cos(u); y1:=sqrt(3)*sin(v)*sin(u); z1:=3*cos(v); |
> | plot3d([x1,y1,z1], u=0..2*Pi, v=0..Pi, grid=[30,30], scaling=constrained, axes=boxed, title="Ellipse example"); |
> | f:=u->(10*Pi -u)*sin(u); a1:=f(u)*sin(v); b1:=f(u)*cos(v); c1:=u; |
> | plot3d([a1,b1,c1], u=0..10*Pi, v=0..2*Pi, grid=[80,80], axes=boxed, title ="Surface of revolution about z-axis"); |
> |
> |