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[" 5.If "cos[tan^(-1){sin(cot^(-1)sqrt(3...

[" 5.If "cos[tan^(-1){sin(cot^(-1)sqrt(3))}]=y," then : "],[[" (A) "y=(4)/(5)" (B) "y=(2)/(sqrt(5))" (C) "y=-(2)/(sqrt(5))" (D) "y^(2)=(10)/(11)]]

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