`tan[2tan^(- 1)(1/5)+pi/4]`

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tan[2.tan^(-1)(1/5)- pi/4]=

Evaluate the following: (i) tan{2\ tan^(-1)(1/5)-pi/4} (ii) tan(1/2\ sin^(-1)(3/4)

The value of tan (2 "tan"^(-1)(1)/(5)-(pi)/(4)) is

tan(2tan^(-1)((1)/(3))-(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)( 1/3) +tan^(-1)( 1/5) + tan^(-1) (1/7 )+tan^(-1) (1/8) = pi/4