1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Unit Tangent For A Curve

  1. Nov 18, 2008 #1
    1. The problem statement, all variables and given/known data

    r(t) = 〈sin(t) − t cos(t), cos(t) +t sin(t), 5 t2 + 7 〉

    Find the unit tangent. T(t)=


    3. The attempt at a solution

    r'(t) = <cos(t) + tsin(t), -sin(t) + tcos(t), 10t>

    T(t) = r'(t)/ |r'(t)|

    |r(t)| = sqrt( 1 + 101t^2)

    And so on.
    Supposably according to the homework I'm wrong, completely wrong.
     
  2. jcsd
  3. Nov 18, 2008 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    Your derivative is wrong, completely wrong. You aren't using the product rule.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Unit Tangent For A Curve
  1. Tangents to the curves (Replies: 5)

Loading...