1. ## Tangent plane

i'm stuck on this problem.

r(u,v) = U^2 i + 2usinv j + ucosv k u =1, v = 0

i already got their partial derivatives

ru(u,v) = 2u +2sinv + cosv

rv(u,v) = 2ucosv -usinv

but i'm stuck here. can i assume that in(z - zo) that zo is zero?

2. ## think i got it..

Originally Posted by greencheeseca
i'm stuck on this problem.

r(u,v) = U^2 i + 2usinv j + ucosv k u =1, v = 0

i already got their partial derivatives

ru(u,v) = 2u +2sinv + cosv

rv(u,v) = 2ucosv -usinv

but i'm stuck here. can i assume that in(z - zo) that zo is zero?
i got r = 3u + 2v - 1
is this correct?