Climbing Anchors
The term climbing anchor is used for any device that rock climbers use to attach themselves and to prevent them from falling. In the diagram below the weight of the load is equal to the 2 times the tension force times cos(theta/2)
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As the angle between the two angles increases, the tension in each anchor rope increases. If the angle was zero degrees, each anchor rope would be holding exactly half the weight of the weight of the climber. If the angle was 120 degrees, each anchor rope would be carrying the weight of exactly one climber's weight. As you approach 180 degrees the tension in each rope approaches infinity, therefore it would be impossible. 
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