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tan^(-1)x+tan^(-1)y=...

tan^(-1)x+tan^(-1)y=

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tan^-1 x + tan^-1y= tan^-1 (frac{x+y}{1-xy} ).

Prove that xy tan^-1x+tan^-1y=tan^-1(frac(x+y)(1-xy))

If tan^-1x + tan^-1y + tan^-1z = pi , then prove that: x + y + z = xyz.

If tan^-1 x + tan^-1y - tan^-1z = 0 , then prove that x + y + xyz = z.

show that: Tan^-1x+tan^-1y = tan^-1(frac{x+y}{1-xy})

If tan^-1x+tan^-1y+tan^-1z=pi ,show that x+y+z=xyz

If tan^-1x+tan^-1y+tan^-1z = frac{pi}{2} , then show that xy+xy+zx = 1

Tan^(-1)(x/y)-Tan^(-1)((x-y)/(x+y))=