cot^(-1)7+cot^(-1)8+cot^(-1)18=cot^(-1)3

The sum of the series cot^(-1)2+cot^(-1)8+cot^(-1)18+cot^(-1)32.........

Let S_(n)=cot^(-1)2 +cot^(-1)8 +cot^(-1)18 +cot^(-1)32+…. to n^(th) term. Then lim_(n to oo)S_(n) is

If the sum of the series cot^(-1)2+cot^(-1)8+cot^(-1)18+…+cot^(-1)2n^(2)+…… " upto "infty " is "(kpi)/4 then the value of K is

Find the sum of the series cot^(-1) 7+cot^(-1)13+cot^(-1)21+cot^(-1)31+... to n terms

Prove that cot^-1 7 + cot^-18 + cot^-118 = cot^-1 3 .

If cot^-1 7 + cot^-1 8 + cot^-1 18 = cot^-1 k , then k is

Find- cot^(-1)1+cot^(-1)2+cot^(-1)3

Prove that: cot^(-1)7+cot^(-1)18=cot^(-1)5 .