Question:
Mark $(\sqrt{)}$ against the correct answer in the following:
$\int_{0}^{\pi / 4} \frac{e^{\tan x}}{\cos ^{2} x} d x=?$
A. $(e-1)$
B. $(\mathrm{e}+1)$
C. $\left(\frac{1}{e}+1\right)$
D. $\left(\frac{1}{e}-1\right)$
Solution:
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