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[cot^(-1)(sqrt(cos alpha))-tan^(-1)(sqrt...

[cot^(-1)(sqrt(cos alpha))-tan^(-1)(sqrt(cos alpha))=x" .then "sin x" is equal to - "],[[" (A) "tan^(2)((alpha)/(2))," (B) "cot^(2)((alpha)/(2))," (C) "tan alpha," (D) "cot((alpha)/(2))]]

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