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Second number = First number + (Sum of digits of first number) 46 - 56 = [{46 + (4 + 6)}] = 46 + 10 = 56 62 - 70 = [{62 + (6 + 2) }] = 62 + 8 = 70 85 – 98 = [{85 + (8 + 5) }] = 85 + 13 = 98 37 - 48 = [{37 + (3 + 7)}] = 37 + 10 = 47
sin2 9 ° + sin2 10 ° + sin2 11 ° + sin2 12 ° + ……… + sin2 81 ° = ?
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