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Only two boxes are heavier than box J. So, box J must be 3 rd heaviest. Equal number of boxes are heavier and lighter than box L. So, box L must be 4 th heaviest. _ > _ > P > R > _ > _ > _ Box K is heavier than box M, which is heavier than box O, which is not the lightest. Box N is heavier than box K. So, box N must be heaviest box. Also, box P must be the lightest. N > K > J > L > M > O > P
sin2 9 ° + sin2 10 ° + sin2 11 ° + sin2 12 ° + ……… + sin2 81 ° = ?
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Simplify the given equation: