If you found T(t) = r'/|r'|, then you should be able to get
N(t) = T'/|T'|
Where do you get stuck?
Consider the vector function given below.
r(t) =
7t, 3 cos t, 3 sin t
(a) Find the unit tangent and unit normal vectors T(t) and N(t).
i found T(t) but I can't get N(t)
1 answer