One end of a regular ladder rests on the ground and the other end on a vertical wall. If the coefficients of friction for the two ends of the scale are 0.6 (and 0.3)), respectively. The slope of the ladder with the wall when it is about to slide is: -Tan-1 3/2 0 -Tan-1 30/3 0 -Tan-1 3/5 -Tan-1 3/3 0
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