A) \[\pi \]
B) \[\frac{\pi }{2}\]
C) 1
D) None of these
Correct Answer: A
Solution :
\[{{\tan }^{-1}}x+{{\tan }^{-1}}y+{{\tan }^{-1}}z\]\[={{\tan }^{-1}}\left[ \frac{x+y+z-xyz}{1-(xy+yz+zx)} \right]\]\[={{\tan }^{-1}}0=\pi \]You need to login to perform this action.
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