- #1
flaxstrax
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Homework Statement
i have to show that the length of line integral squared on surface (ds^2) , which has vectorequation r=r(u,v) (r here is a vector), can be given as ds^2=Edu^2+2Fdudv+Gdv^2 (Find functions E,G,F)
Homework Equations
I should use diferential dr=du(t)e1+dv(t)e2 (dr, e1 and e2 here are vectors )
ds=|dr/dt|dr (dr here is vector)
dS=dS/n (dS/n is a vector )
The Attempt at a Solution
I'm pretty much stuck at the beginning , i don't see how those relevant equations help me here ?
Probably i should do something with dS/n.
Sorry for bad english and possibly translation, point out mistakes so i can learn.