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Greetings everyone,

I have a problem: "Consider the curves r1(t)=(t, 1-t, 16+t^2) and

r2(t)=(8-s,s-7, s^2)

a) At what point do they meet?

b) Find their angle of intersection

The first part is easy, but I'm encountering some problems with b). To find the angle we need to apply the formula |n||m| cos(a)=n.m

The point is that we dont have the values of n and m. I tried to subsitute values for t and s (we also know the point of intersection) but still couldn't get it.

Someone can help?

Thanks

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# Vecto Calculus

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