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