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" 21."4tan^(-1)(1)/(5)-tan^(-1)(1)/(239)...

" 21."4tan^(-1)(1)/(5)-tan^(-1)(1)/(239)=(pi)/(4)

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Prove: 4tan^(-1)((1)/(5))-tan^(-1)((1)/(239))=(pi)/(4)

4 tan ^(-1 )""(1)/(5) - tan ^(-1)""(1)/(239)=(pi)/(4)

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

Prove the following: 4\ tan^(-1)(1/5)-tan^(-1)(1/(239))=pi/4

Find the value of 4tan^(-1)((1)/(5))-tan^(-1)((1)/(239))

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)""(3)/(4)+tan^(-1)""(3)/(5)-tan^(-1)""(8)/(19)=(pi)/(4)

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

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