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Math Help - vectors help

  1. #1
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    vectors help

    for the vectors a=i+4j-2k and b=2i-j+3k find :

    axb
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  2. #2
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    Re: vectors help

    Quote Originally Posted by bobmarly12345 View Post
    for the vectors a=i+4j-2k and b=2i-j+3k find : axb
    Evaluate this determinate expanding along the first row:
    \left| {\begin{array}{rrr}  i&j&k \\   1&4&{ - 2} \\   2&{ - 1}&3 \end{array}} \right|=?
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  3. #3
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    Re: vectors help

    I assume a x b is the cross product. Try the method described in Wikipedia.
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