A) xyz
B) 0
C) 1
D) 2xyz
Correct Answer: A
Solution :
\[{{\tan }^{-1}}x+{{\tan }^{-1}}y+{{\tan }^{-1}}z=\pi \] Þ \[{{\tan }^{-1}}\left[ \frac{x+y+z-xyz}{1-xy-yz-zx} \right]=\pi \] Þ \[x+y+z-xyz=0\] Þ \[x+y+z\,\,=xyz\].You need to login to perform this action.
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