a)
x=3*sin(u)*2*cos(v)
y=2*u
z=3*(cos(v)+log(tan(v/7)))+0.3*u
0<=u<=20
0.5<=v<=3
Rotacija po y osi.
b)
X=1*sin(2*u)
Y=3*u+2*sin(u)
Z=2*u
0<=U<=2*pi
X=3*sin(v*2)
Y=4+sin(v)/5*3
Z=2*v+sin(v)
0<=V<=2*pi