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QID: 48 – What is the value of [(sin x + sin y) (sin x — sin y)]/[(cosx + cosy) (cosy — cosx)]?
[(sin x + sin y) (sin x — sin y)]/[(cosx + cosy) (cosy — cosx)] का मान क्या है?

A) 0 B) -1 C) 1 D) 2

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