[" If "2<=a<3," then the value of "cos^(...

[" If "2<=a<3," then the value of "cos^(-1)cos[a]+csc^(-1)csc[a]+cot^(-1)cot[a]" ,(where "[.]" denotes greatest "],[" integer less than equal to "x" ) is equal to "],[[" (A) "2-pi," (B) "2+pi," (C) "pi," (D) "6]]

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