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Math Help - vectors equation

  1. #1
    Senior Member
    Joined
    Oct 2009
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    459

    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. #2
    Senior Member
    Joined
    Oct 2009
    Posts
    459

    Re: vectors equation

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