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" 11.Prove that "2tan^(-1)(1)/(3)+tan^(-...

" 11.Prove that "2tan^(-1)(1)/(3)+tan^(-4)(1)/(7)=(pi)/(4)

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

prove that 2(tan^(-1)1)/(3)+(tan^(-1)1)/(7)=(pi)/(4)

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

prove that: 2 tan ^(-1).(1)/(3) + tan^(-1).(1)/( 7) = (pi)/(4)

prove that: 2 tan ^(-1)x =(1)/(3) tan^(-1).(1)/( 7) = (pi)/(4)

Prove that 2tan^(-1)""(3)/(4)-tan^(-1)""(17)/(31)=(pi)/(4)

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

Prove that : 2tan^(-1)((3)/(4))-tan^(-1)((17)/(31))=(pi)/(4) .

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