> x:=t/13/Pi+1/3*sin(t^2); > y:=(1+1/13*sin(t^2))*cos(t); > z:=(1+1/13*cos(t^2))*sin(t); t 2 x := 1/13 ---- + 1/3 sin(t ) Pi 2 y := (1 + 1/13 sin(t )) cos(t) 2 z := (1 + 1/13 cos(t )) sin(t) > with(plots): > spacecurve([x,y,z],t=0..3*Pi,numpoints=1000, > axes='NORMAL',thickness=2,orientation=[-25,80]);