Plotting a sphere or portions thereof

A sphere of radius 1:

> plot3d(1,theta=0..2*Pi,phi=0..Pi,coords=spherical,scaling=constrained,axes=frame);

[Maple Plot]

>

A theta-restricted section of the sphere:

> plot3d(1,theta=Pi..2*Pi,phi=0..Pi,coords=spherical,scaling=constrained,axes=frame);

[Maple Plot]

>

A phi-restricted section of the sphere:

> plot3d(1,theta=0..2*Pi,phi=Pi/4..Pi,coords=spherical,scaling=constrained,axes=frame);

[Maple Plot]

>

A section of the sphere restricted by both theta and phi:

> plot3d(1,theta=Pi..2*Pi,phi=Pi/4..3*Pi/4,coords=spherical,scaling=constrained,axes=frame);

[Maple Plot]

>