a) sinus
x=10*sin(5*u)*cos(u)
y=5*u*sin(u)
z=3*u
0<=u<= 2pi
rotacija oko y ose
b) sinus
X= sin(3*u)*sin(4*u)
Y= 5*cos(u)
Z=1
0<= u <=2*pi
X= sin(v)*2
Y= cos(v)
Z=v
0<= v <=2*pi
