If and find A and B


tan (A + B) =

tan (A + B) = tan 60o


A + B = 60O (i)


tan (A – B) =


tan (A - B) = tan 30O


A - B = 30 (ii)


On adding both equations, we obtain


2 A = 90


A = 45


From equation (i), we obtain


45 + B = 60


B = 15o


Therefore, A = 45° and B = 15°


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