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So thats the problem.

All I got so far is

r1(t)=t(i)+t^2(j)+t^3(k)

r2(t)=sint(i)+sin 2t(j)+t(k)

Now I'm stuck. I'm not sure where to go now.

- Thread starter Juntao
- Start date

- 45

- 0

So thats the problem.

All I got so far is

r1(t)=t(i)+t^2(j)+t^3(k)

r2(t)=sint(i)+sin 2t(j)+t(k)

Now I'm stuck. I'm not sure where to go now.

- 362

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Now how do you find the angle f between two vectors?

A*B=ABcosf

1=(1)sqrt(6)cosf

f=arccos(sqrt(6)/6)=66 degrees

Science Advisor

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I interpreted, "Don't go off on a tangent" to mean "Tangents aren't the way to solve the problem."

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Great. My answer matched yours.

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