$\int_{-1}^1 \frac{\cosh x}{1+e^{2 x}} d x$ का मान ज्ञात कीजिए :

  • A
    $0$
  • B
    $1$
  • C
    $\frac{e^2-1}{2 e}$
  • D
    $\frac{e^2+2}{2 e}$

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