(v)` tan^(-1)((1-tan((x)/(2)))/(1+tan((x)/(2))))`

int{(1-tan((x)/(2)))/(1+tan((x)/(2)))}dx=?

sin^(-1)((1-tan^(2)x)/(1+tan^(2)x))

sec^(-1)((1+tan^(2)x)/(1-tan^(2)x))

Solve for x:tan^(-1)((2-x)/(2+x))=(1)/(2)tan^(-1)(x)/(2),x>0

int(1-tan^(2)x)/(1+tan^(2)x)dx

[ If xgt0 then which of the following is true 1) tan^(-1)xgt(x)/(1+x^(2)), 2) tan^(-1)x=(x)/(1+x^(2)) 3) tan^(-1)xlt(x)/(1+x^(2)), 4) tan^(-1)x!=(x)/(1+x^(2))]

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

Solve : tan^(-1) ((x-1) /( x-2))-tan^(-1)((x+1)/(x+2))=(pi)/(4) ,

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

If: tan^(-1)((x-1)/(x+1))+ tan^(-1)((2x-1)/(2x+1)) = tan^(-1) (23/36) . Then: x=