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" Prove ":cot^(-1)7+cot^(-1)8+cot^(-1)18...

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

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

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

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

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

Prove that : 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.........

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

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