`tan^(-1)1+tan^(-1)2+tan^(-1)3=`A. `0`B. `pi`C. `(pi)/(4)`D. `(pi)/(2) – InterviewSolution

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1.	`tan^(-1)1+tan^(-1)2+tan^(-1)3=`A. `0`B. `pi`C. `(pi)/(4)`D. `(pi)/(2)`
Answer» Correct Answer - B

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