MCQ
The value of $\int \frac{1}{e^x+e^{-x}} d x$ is
  • A
    $\tan ^{-1}\left(e^x\right)+c$
  • B
    $\tan ^{-1}\left(e^{-x}\right)+c$
  • C
    $\log \left(e^x+e^{-x}\right)+c$
  • none of these

Answer

Correct option: D.
none of these
none of these

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