[" If "alpha+beta=(pi)/(2)" and "alpha=(...

[" If "alpha+beta=(pi)/(2)" and "alpha=(1)/(3)," then "sin beta" is "],[[" (A) "(sqrt(2))/(3)," (B) "(2sqrt(2))/(3)," (C) "(2)/(3)," (D) "(3)/(4)]]

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