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[cot(logx)]2xdx is equal to 

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a
−cotlogx−logx+C
b
cotlogx+logx+C
c
−cotlogx+logx+C
d
cotlogx−logx+C

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detailed solution

Correct option is A

Let I=∫[cot⁡log⁡x]2xdxlog⁡x=y1xdx=dyI=∫cot2⁡ydy=∫cosec2⁡y−1dy=−cot⁡y−y+C=−cot⁡log⁡x−log⁡x+C


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