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Homework Help: Multivariable Calculus - Tangent Line

  1. Sep 19, 2010 #1
    1. The problem statement, all variables and given/known data
    Find parametric equations for the tangent line at the point
    (cos (-5*pi/6), sin (-5*pi/6), -5*pi/6) on the curve
    x(t) = cos t
    y(t) = sin t
    z(t) = t

    (Your line should be parametrized so that it passes through the given point at t=0).

    Im not really understanding the question that well, can anyone help me understand and solve this problem?

    2. Relevant equations



    3. The attempt at a solution
    What I have so far is,

    r'(t) = ( - sin t , cos t, 1)
    so
    x(t) = -sin t + cos(-5pi/6)
    thats all I have so far and its wrong.
     
    Last edited: Sep 19, 2010
  2. jcsd
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