sum_(n=1)^(oo)tan^(-1)(3)/(n^(2)+n-1)

sum_(n=1)^(oo)tan^(-1)((8)/(4n^(2)-4n+1)) is equal to

If x_(0)=sum_(n=1)^(oo)tan^(-1)((4n)/(n^(4)-2n^(2)+3)), then which of the following is/are correct

sum_(n=1)^(oo)(tan^(-1)((4n)/(n^(4)-2n^(2)+2))) is equal to ( A) tan^(-1)(2)+tan^(-1)(3)(B)4tan^(-1)(1)(C)(pi)/(2)(D)sec^(-1)(-sqrt(2))

The value of cot sum_(n=1)^(oo)cot^(-1)((2)/(n^(2))sum_(n=1)^(n)k^(3))

Find sum_(n=1)^(oo)cot^(-1)(2*n^(2))=

If S=sum_(n=2)^(oo)(3n^(2)+1)/((n^(2)-1)^(3)) then (9)/(4S) is

Find the value of lim_(n to oo) (tan(sum_(r=1)^(n) tan^(-1)((4)/(4r^(2)+3)))) .

Find the value of lim_(n to oo) (tan(sum_(r=1)^(n) tan^(-1)((4)/(4r^(2)+3)))) .