1.
x=1/3*(1+cos(2*u))*u
y=u*cos(u)
z=1
0<=u<=7*pi
rotacija oko y ose
2.
x=1/2*sin(3*u)
y=u
0<=u<=3*pi
x=sin(2/5*v)
y=1
z=v
0<=v<=7*pi
