SinA + SinB = 2It means A and B are 90 because sin90 = 1SIN A = 1/Cos A and Sin b = 1/cos B according to trignomatry1/Cos A + 1/ Cos B = 2Cos A + Cos B = 2 X Cos A Cos BCos A + Cos B = 2 x Cos 90 x Cos 90 = 0 Answer@skb
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