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Homework Help: Dot product, complex numbers

  1. Jun 24, 2012 #1
    1. The problem statement, all variables and given/known data

    3. The attempt at a solution

    do you see where it sees sqrt((1-i)(1+i)+9)?

    It should be (1+i)(1+i)

    Why isn't it?
  2. jcsd
  3. Jun 24, 2012 #2


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    Science Advisor
    Homework Helper

    hi robertjford80! :smile:
    the complex inner product is defined with a conjugate on one side …

    <a|b> = a*.b

    (for real vectors, it makes no difference, so this isn't a different definition, it's the same as for real vectors :wink:)
  4. Jun 24, 2012 #3
    ok thanks.
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