" 18."2tan^(-1)(3)/(4)-tan^(-1)(17)/(31)=(pi)/(4)

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

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

Prove that 2sin^(-1)[(3)/(5)]-tan^(-1)[(17)/(31)]=(pi)/(4)

Prove the following: 2\ tan^(-1)(3/4)-tan^(-1)((17)/(31))=pi/4

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

Prove that: tan^(-1)(1)/(7)+tan^(-1)(1)/(13)=tan^(-1)(2)/(9)tan^(-1)+tan^(-1)(1)/(5)+tan^(-1)(1)/(8)=(pi)/(4)tan^(-1)(3)/(4)+tan^(-1)(3)/(5)-tan^(-1)(8)/(19)=(pi)/(4)tan^(-1)(1)/(5)+tan^(-1)(1)/(7)+tan^(-1)(1)/(3)+tan^(-1)(1)/(8)=(pi)/(4)cot^(-1)7+cot^(-1)8+cot^(-1)18=cot^(-1)(1)/(13)

Prove the following: 2\ tan^(-1)3/4-tan^(-1)(17)/(31)=tan^(-1)pi/4

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

tan^(-1)((1)/(2))+tan^(-1)((1)/(3))=(pi)/(4)|0tan(1)+tan(1)