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" The value of "cot^(-1)((1+2^(2))/(3))+...

`" The value of "cot^(-1)((1+2^(2))/(3))+cot^(1)((1+6^(2))/(5))+cot^(-1)((1+12^(2))/(7))+..." up to "8" terms is "tan^(-1)((m)/(n))" .(where "m,n" are coprime ) then "m+n" is equal to "`

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