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60·√3 = (1 / 2)·14·{ 21·7·sin(x) / [ (6·√3) - 7·sin(x) ] }·sin{ x + arcsin[ (6·√3) / 7 - sin(x) ] }
60·√3 = (1 / 2)·14·{ 21·7·sin(x) / [ (6·√3) - 7·sin(x) ] }·sin{ x + arcsin[ (6·√3) / 7 - sin(x) ] }
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