DU-A_17-18BUET_16-17JU-A_22-23RU-A_21-22JU-A_19-20BSMRSTU-A_17-18PUST-A_17-18JU-A_16-17SUST-A_07-08

sin1x+sin1y=π2\sin ^{-1} x+\sin ^{-1} y=\frac{\pi}{2} হলে, নিচের কোনটি সঠিক?

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