x=2cost,y=2sint,z=t/3,
0≤t≤4π
x=t,y=t3,z=t2,
−2≤t≤2
x=(2+sin(10t))cost,y=(2+sin(10t))sint,z=cos(10t),
0≤t≤2π
x=32(1+cost),y=32sint,z=3sin(t2),
0≤t≤4π
x=(1.04)tcost,y=(1.04)tsint,z=(1.04)t,
0≤t≤10π
x=3sin(74t)cos(t),y=3sin(74t)sin(t),z=3cos(74t),
0≤t≤8π