Question

calc 3 help
The position vector for a curve C is r(t) = costi+sintj+k. Find the unit tangent vector T, the unit normal vector N and unit binormal vector B at t = (pi/4)

Answer 1

the formula for the unit tangent vector is the derivative of the parametric function divided by its magnitude

Answer 2

nevermind, found the formulas in my notes ahah, thanks for the help though.

Answer 3

in case you lose your book ;)
http://tutorial.math.lamar.edu/Classes/CalcII/TangentNormalVectors.aspx

Answer 4

my professor actually doesn't use a book =[[. So it's all notes from lectures

Answer 5

in general, Paul's online math notes are great up through linear algebra and differential equations, so you may want to use that site as a supplement to your class notes

http://tutorial.math.lamar.edu/

Answer 6

thanks, i'm actually taking linear next semester, and differential in the spring. just getting calc 3 out of the way during the summer

Answer 7

just getting calc 3 "out of the way"?
I think vector calc is kinda hard, you must be brave.
Good luck!