Question:
Mark $(\sqrt{)}$ against the correct answer in each of the following:
$\int \frac{1}{\sin ^{2} x \cos ^{2} x} d x=?$
A. $\tan x+\cot x+C$
B. $\tan x-\cot x+C$
C. $-\tan x+\cot x+C$
D. none of these
Solution:
Given
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