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[obm-l] Re:[obm-l] Probleminhas faceis que n�o saio..



1)
Sen(x-110�) = p, o valor de cos (20-x) �:

cos(20�-x) = cos(x - 20�) = sin[90� - (x - 20�)] = sin[90� - x + 20�] = sin(x - 110�) = p