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[" The value of "],[cot(sum(n=1)^(23)cot...

[" The value of "],[cot(sum_(n=1)^(23)cot^(-1)(1+sum_(k=1)^(n)2k))" is "],[[" (A) "(23)/(25),],[" (B) "(25)/(23),],[" (C) "(23)/(24)],[" (D) "(24)/(23)]]

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