Section 11.7 #jh1

> circ1:=[cos(t),sin(t),0];

[Maple Math]

> circ2:=[cos(t),0,sin(t)];

[Maple Math]

> circ3:=[0,cos(t),sin(t)];

[Maple Math]

> tubeplot({circ1,circ2,circ3},t=0..2*Pi,radius=1/5,scaling=constrained,
axes=frame,labels=['x','y','z'],orientation=[22,75]);

[Maple Plot]

>