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little_genius (295)

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Olaaa!! Perrrfect answer. 53  [68 rates]

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put x=cot t

integral bcoms

= - sec t * cosec t * cot t dt

= - cosec ^2 t dt

= cot t

=x


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 this reply: 10 points  (with Olaaa!! Perrrfect answer.   in 2 votes )   [?]
 
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