[" (1) "(C)-2],[" 12.If sin "theta=(-4)/...

[" (1) "(C)-2],[" 12.If sin "theta=(-4)/(5)" and "theta" lies in third quadrant then the value of "cos(theta)/(2)" is "],[[" (A) "(1)/(5)," (B) "-(1)/(sqrt(10))," (C) "-(1)/(sqrt(5))," (D) "(1)/(sqrt(10))]]

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