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" (iv) "tan^(-1)((1)/(2))+tan^(-1)((1)/(...

" (iv) "tan^(-1)((1)/(2))+tan^(-1)((1)/(3))=(pi)/(4)

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Prove that tan^(-1)((1)/(2))+tan^(-1)((1)/(3))=(pi)/(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: tan^(-1)((1)/(5))+tan^(-1)((1)/(7))+tan^(-1)((1)/(3))+tan^(-1)((1)/(8))=(pi)/(4)

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