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Question

Evaluate:

xcot2xdx

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Solution

cot2xdx Here u=x,v=cot2x
x(xcotx)xcot(x)dx
+x+cotxdx
xdx+cotxdx [cotxdx=ln|sinx|
x22+ln|sinx|+c
x2xcotx+x22+ln|sinx|+c

1120431_1140129_ans_629546ff43fe44b5b4db99cc0ca9f64d.jpg

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