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2Tan ^(- 1) (1/5)+Tan^(- 1)(1/7) +2 Tan^...

`2Tan ^(- 1) (1/5)+Tan^(- 1)(1/7) +2 Tan^-1 (1/8)=`

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Prove that tan^(-1) (1/5)+ tan^(-1) (1/7) + tan^(-1) (1/3) + tan^(-1) (1/8) = pi/4

tan^(-1) (1/5) + tan^(-1) (1/7) + tan^(-1) (1/3) + tan^(-1) (1/8) = π/4

Prove that tan^ (-1)( 1/3) +tan^(-1)( 1/5) + tan^(-1) (1/7 )+tan^(-1) (1/8) = pi/4

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