`2T a n^(- 1)1/3+tan^(- 1)(1/7)=`

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

The numerical value of 2tan^(-1) (1/3) +tan^(-1) (1/7) =_______.

Find the value of : 4(2 tan^(-1) . 1/3 +tan^(-1). 1/7)

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

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

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

Show that 2 tan^(-1)(1/2)+tan^(-1) (1/7)=tan^(-1)(31/17)

Prove the following 2 tan^(-1). 1/2 +tan^(-1) . 1/7 = tan^(-1). 31/17

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