1.

If tan^(-1)x+tan^(-1)y+tan^(-1)z=pi then x+y+z=

Answer»

`xy+yz+zx=1`
`X^(2)+y^(2)+Z^(2)+2xyz=1`
`x+y+z=xyz`
`Sigmax+Sigmayz=1+xyz`

ANSWER :A


Discussion

No Comment Found