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\int_{0}^{1} \frac{d x}{e^{x} + e^{- x}}

এর মান কত?

\tan^{- 1} (e + 1) - \tan^{1} 2

\tan^{- 1} e - \frac{π}{4}

\tan^{- 1} (e + \frac{π}{4})

\tan^{- 1} (e - 1) - \tan^{1} 1

ANS : 2

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