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Math Help - Help needed on Vectors and Perpendicularity.

  1. #1
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    Help needed on Vectors and Perpendicularity

    Hi, Could someone please help me with this one?

    Find two unit vectors perpenduicular to both \vec{v} and \vec{w} where \vec{v} = i + 2j - 7k and \vec{w} = 5i + j + k

    thanks!
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  2. #2
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    Quote Originally Posted by rorosingsong View Post
    Find two unit vectors perpenduicular to both \vec{v} and \vec{w} where \vec{v} = i + 2j - 7k and \vec{w} = 5i + j + k
    Find \vec{u}=<br />
\dfrac{\vec{v}\times\vec{w}}{\|\vec{v}\times\vec{w  }\|}.

    Then \vec{u}~\&-\vec{u} will work.
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  3. #3
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    Whoops, just realised I posted this in calculus -- sorry, meant to do it in linear algebra!

    Sorry guys.

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  4. #4
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    In fact, it is more a Calculus problem than Linear Algebra because it refers to vector in R^n, not a general vector space.
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