If 5∑n=15∑m=1tan−1mn=kπ,k∈R, then [k]=where ([.] denotes grea – InterviewSolution

1.	If 5∑n=15∑m=1tan−1mn=kπ,k∈R, then [k]=where ([.] denotes greatest integer function)
Answer» If $5 \sum n = 1 5 \sum m = 1 {tan}^{- 1} \frac{m}{n} = k π, k \in R,$ then $[k] =$ where ( $[.]$ denotes greatest integer function)

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