(Solution) - For the transmission exerted by the three cables at A must be -(2025 Original AI-Free Solution)

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For the transmission tower of Prob. 2.89, determine the tensions in cables AB and AD knowing that the tension in cable AC is 1770 N and that the resultant of the forces exerted by the three cables at A must be vertical.
Problem 2.89: A transmission tower is held by three guy wires anchored by bolts at B, C, and D. If the tension in wire AB is 2100 N, determine the components of the force exerted by the wire on the bolt at B.