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Math Help - vector

  1. #1
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    vector

    How do I solve this?
    Given\ c\times{d}=2i+3j, determine \ c\cdot{(2i+3j)}
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by ashes View Post
    How do I solve this?
    Given\ c\times{d}=2i+3j, determine \ c\cdot{(2i+3j)}
    The cross product of two vectors is a vector at right angles to both of
    the vectors.

    So The dot product of either of these two vectors with the cross product
    is zero.

    So:

    c\cdot (2i+3j) =0

    RonL
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