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Thread: Perpendicular vectors

  1. May 30th 2010, 10:10 AM #1
    kandyfloss
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    Perpendicular vectors

    I've have another question

    how do you find a vector which is perpendicular to both 3i-6j-4k and -3i+2j+2k
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  2. May 30th 2010, 10:19 AM #2
    Plato
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    Quote Originally Posted by kandyfloss View Post
    how do you find a vector which is perpendicular to both 3i-6j-4k and -3i+2j+2k
    Find the cross-product: <3,-6,-4>\times<-3,2,2>.
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  3. May 30th 2010, 10:24 AM #3
    kandyfloss
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    i need to find without using the cross product,since we haven't learnt that yet
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