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tan^-1 (1/6) + tan^-1 (5/7) = π/4...

`tan^-1 (1/6) + tan^-1 (5/7) = π/4`

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tan^-1 (1/2) + tan^-1 (1/3) = π/4

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

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Prove that 2 tan^(-1) ((1)/(8)) + tan^(-1) ((1)/(7)) + 2 tan^(-1) ((1)/(5)) = (pi)/(4)

Prove that- tan^-1(1/2)+tan^-1(1/5)+tan^-1(1/8)=pi/4