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Homework Help: Linear Algebra help

  1. Dec 7, 2005 #1

    jtm

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    I'm really really struggling on this question and am becoming very depressed from the stress that is being generated.

    http://www.math.rutgers.edu/courses/250/250C-f05/f05lab6.pdf [Broken]

    Question 3 Part a) I've been stuck on it for hours. The last part where it talks about "show by algebraic calculation" Please help me. I'm really sad. :confused: :confused: :confused: :confused:
     
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Dec 7, 2005 #2

    jtm

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    I've tried using dot products but I don't see how I can represent that into a matrix. I don't see how doing a dot product of a matrix with a transposed matrix is even possible. Q dot product Q' is the identity matrix somehow.. wouldn't it be all 0s since the vectors are all orthogonal to eachother?
     
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