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Math Help - vectors equation

  1. March 29th 2012, 10:44 AM #1
    Stuck Man
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    vectors equation

    (p+q).(q+r)X(r+p) = 2(p.qXr)

    I am asked to show this but when I use some test vectors it does not equate. Can anyone spot the mistake?
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  2. March 30th 2012, 10:36 AM #2
    Stuck Man
    Stuck Man is offline
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    Re: vectors equation

    I have done this now. I had some confusion about operator precedence.
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