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Homework Help: Static truss

  1. Nov 27, 2011 #1
    Im having trouble understating this:

    The last part:

    DEz=8333N(5/15) where does this come from?

    15m is the hight and 5m is the base of the triangle.

    Attached Files:

  2. jcsd
  3. Nov 27, 2011 #2
    It's the horizontal component of DE i.e FDEcosθ
    where cosθ = Opposite/Adjacent = (15/5)
  4. Nov 27, 2011 #3
    but isn't cosine adjacent/Hypotenuse?
  5. Nov 27, 2011 #4
    Oh yes, sorry!
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