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Help me find normal to this equ.

  1. Nov 9, 2003 #1
    r(t) = <acos t , bsin t>
     
  2. jcsd
  3. Nov 9, 2003 #2

    HallsofIvy

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    Now, how about you go back, read the question again and the give it exactly.

    In the first place an equation doesn't have a normal, a curve does.

    If you mean, "find the equation for the normal to the curve given by r(t) = <acos t , bsin t> for any t", then say so.

    Heres' a major hint the vector <a, b> is always normal to the vector <-b, a>.
     
  4. Nov 10, 2003 #3

    ShawnD

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    In order to have a normal, you need to give us 1 set of coordinates.
     
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