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\tan^{- 1} \frac{2}{3} + \cos^{- 1} \frac{- 2}{\sqrt{13}} = ?

\tan^{- 1} \frac{5}{9}

\tan^{- 1} \frac{3}{7}

\frac{π}{2}

\frac{π}{4}

ANS : 3

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