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" 15."quad tan^(-1)(1)/(2)+tan^(-1)(1)/(...

" 15."quad tan^(-1)(1)/(2)+tan^(-1)(1)/(4)=...

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Evaluate 2tan^(-1)(1/2)+tan^(-1)(1/4)

Evaluate 2tan^(-1)(1/2)+tan^(-1)(1/4)

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

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

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

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