Jan25-12, 08:38 PM
1. The problem statement, all variables and given/known data
This is a problem involving parametric equations.
At what point do the curves intersect?
Find the angle of intersection, to the nearest degree.
3. The attempt at a solution
I found the point of intersection, (2,0,16). This is when t=2 and s=4.
I found the tangent vectors.
d/dt(r1) = <1,-1,2t>
d/ds(r2) = <-1,1,2s>
I used r1[itex]\cdot[/itex]r2 = |r1||r2|cos[itex]\theta[/itex], using the tangent vectors at t=2 and s=4, and solved for theta.. I came up with 23°, but the system tells me I'm wrong. What happened?
EDIT:: Okay.... it seems like I was coming up with a different answer every time. Got it on my last try though. Gotta be more careful... for anyone wondering, the correct answer is 29°
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