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Homework Help: Optimization problem.

  1. Dec 15, 2011 #1
    1. The problem statement, all variables and given/known data
    I have attached a picture with the problem and my attempt. The answer is D=L/sqrt(3). I know that a much easier method to solving this is by setting the distance from B to D equal to x. However I wanted a more challenging derivation and set the distance from D to C equal to x. When I do this I keep getting the wrong answer. I have repeated the same problem three times and I am not sure why I cannot get the right answer.

    Could someone please take a look at my work and give me a hint to what I have been doing wrong?

    Thanks!
     

    Attached Files:

  2. jcsd
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