[tich phan] tinh sao day???

  • Thread starter enternalfriendshipylt
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M

maxqn

$I = \int_{}^{}\frac{xcosx + sinx - sinx}{xsinx+cosx}dx = \int \frac{d(xsinx + cosx)}{xsinx + cosx} = ln|xsinx + cosx| + C$
 
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