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=>Sen(A + B) = SenACosB + CosASenB
=>Sen(A + B) = SenACosB - CosASenB
Para el Coseno de un angulo
=>Cos(A + B) = CosA.CosB - SenA.SenB
=>Cos(A - B) = CosA.CosB + SenA.SenB
Para la Tangente de un angulo
=> Tag(A + B) = (TagA + TagB)/(1 - TagATagB)
=> Tag(A - B) = (TagA - TagB)/(1 + TagATagB)