Question:
Mark $(\sqrt{ })$ against the correct answer in each of the following:
$\int e^{\tan x} \sec ^{2} x d x=?$
A. $e^{\tan x}+\tan x+C$
B. $e^{\tan x} \cdot \tan x+C$
C. $e^{\tan x}+C$
D. none of these
Solution:
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