Thread: Find the points where orthogonal

Consider the helix r(t) = <cost, sint, t> for [-inf, inf]. Find all points on the helix at which r and r' are orthogonal

Originally Posted by jessicadowning

Consider the helix r(t) = <cost, sint, t> for [-inf, inf]. Find all points on the helix at which r and r' are orthogonal

Well if we take the derivative we get



Two vectors are orthongal is their dot product is equal to zero, so....

Can you finish from here?

By the way how is Corvallis? I miss it alot. I would kill for Tarn Tip Thai about now.

Hey jessicadowning.

Can you compute r'(t)? When are two vectors orthogonal? (Hint: it has something to do with something being 0)

Yeah, I got it from there, thanks so much!
And Corvallis is great, I'm loving it so far! (I'm a freshman, lol)
I haven't heard of Tarn Tip Thai, but it sounds good, I'll have to try it! :)

Originally Posted by jessicadowning

Yeah, I got it from there, thanks so much!
And Corvallis is great, I'm loving it so far! (I'm a freshman, lol)
I haven't heard of Tarn Tip Thai, but it sounds good, I'll have to try it!

It is on Monroe on the North side of campus, it is inexpensive and they have good food. It is cash only so be prepared!