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" 2furs art far- "2tan^(-1)(1)/(3)+tan^(...

" 2furs art far- "2tan^(-1)(1)/(3)+tan^(-1)(1)/(7)=(pi)/(4)

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2tan^(-1)(1/2)-tan^(-1)(1/7)=(pi)/(4)

tan^(-1)(1/3)+(1)/(2)tan^(-1)(1/7)=(pi)/(8)

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)

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

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)

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

tan(2tan^(-1)((1)/(3))-(pi)/(4))

tan^(-1)3-tan^(-1)2=tan^(-1)(1/7)