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[" 146) If "int(1)^((1)/(2))log cos xdx=...

[" 146) If "int_(1)^((1)/(2))log cos xdx=(pi)/(2)log((1)/(2))," then "int_(0)^((1)/(2))log sec xdx=],[[" A) "(pi)/(2)log((1)/(2))," B) "1-(pi)/(2)log((1)/(2))," C) "1+(pi)/(2)log((1)/(2))," D) "(pi)/(2)log2]]

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