Question:
Mark $(\sqrt{ })$ against the correct answer in the following:
$\int_{0}^{1} \frac{d x}{\left(e^{x}+e^{-x}\right)}=?$
A. $\left(1-\frac{\pi}{4}\right)$
B. $\tan ^{-1} \mathrm{e}$
C. $\tan ^{-1} \mathrm{e}+\frac{\pi}{4}$
D. $\tan ^{-1} \mathrm{e}-\frac{\pi}{4}$
Solution:
