Editor
$\int \frac{x}{\sin^{2}x}dx$ is equal to:
Difficulty: Easy
A: 
$x\cot x+ln|\sinx|$
B: 
$-x\cot x-ln|\sinx|$
C: 
$x\cot x-ln|\sinx|$
D: 
$x.\tan x-ln|\secx|$
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