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$\tan^{- 1} x + \tan^{- 1} y$ = কত? যখন $(x y > 1)$

\tan^{- 1} \frac{x + y}{1 - x y}

\tan^{- 1} \frac{x + y}{1 - x y} - π

\tan^{- 1} \frac{x + y}{1 - x y} + π

\tan^{- 1} \frac{x + y}{1 - x y} + \frac{π}{2}

ANS : 3

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