Question:
Mark $(\sqrt{)}$ against the correct answer in each of the following:
$\int \frac{\sec ^{2} x}{\operatorname{cosec}^{2} x} d x=?$
A. $\tan x+x+C$
B. $\tan x-x+C$
C. $-\tan x+x+C$
D. $-\tan x-x+C$
Solution:
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