The 20-in. tube AB can slide along a horizontal rod. The ends A and B of the tube are
Chapter 3, Problem 3.41(choose chapter or problem)
The 20-in. tube AB can slide along a horizontal rod. The ends A and B of the tube are connected by elastic cords to the fixed point C. For the position corresponding to x = 11 in., determine the angle formed by the two cords (a) using Eq. (3.32), (b) applying the law of cosines to triangle ABC.
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