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ATQ, Let, the increased investments of Amit, Bheem and Chintu are Rs. 3a, Rs. 3a and Rs. 4a, respectively. Ratio of their profits = 6000 + 6000 + 3a : 9000 + 9000 + 3a : 15000 + 15000 + 4a = 12000 + 3a : 18000 + 3a : 30000 + 4a Profit share of Bheem = (18000 + 3a)/ (60000 + 10a) × 7560 = {3(6000 + a)/10(6000 + a)} × 7560 = 3/10 × 7560 = Rs.2,268
sin2 9 ° + sin2 10 ° + sin2 11 ° + sin2 12 ° + ……… + sin2 81 ° = ?
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