If `tan^(-1)x,tan^(-1)y,tan^(-1)z` are in A.P the `(2y)/(1-y^(2))=`

If tan^(-1)x-tan^(-1)y=tan^(-1)A, then A=

If x,y,z are in AP and tan^(-1)x,tan^(-1)y,tan^(-1)z are also in AP, then

If tan^(-1)x,tan^(-1)y and tan^(-1)z are in A.P. then find the algebraic relation between x,y and z. If x,y,z are also in A.P.then show that x=y=z and y!=0

If tan^(-1)x+tan^(-1)y+tan^(-1)z=pi , then 1/(xy)+1/(yz)+1/(zx)=

If tan^(-1)x+tan^(-1)y+tan^(-1)z=0 then the value of (1)/(xy)+(1)/(yz)+(1)/(zx)is(x,y,z!=0)

If x, y, z are in A.P. and tan^(-1) x, tan^(-1) y and tan^(-1)z are alos in A.P. then