var('z,x,y,t')
z=3*t
x=cos(t)
y=sin(t)
fr=vector([z,x,y])
print fr
r(t)=[cos(t),sin(t),3*t]
print fr
dr=diff(r,t)
fr_dr=fr.dot_product(dr)
print fr_dr
sol=integrate(fr_dr,t,0,2*pi)
print sol

Kreyszig-6.2 (last edited 2010-12-16 12:52:59 by vsowjanya)