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Title: Definite Integration

Question Details:

Posted On: Dec 31, 2011 09:29 PM

Integration from 0 to infinity x²cosx / (xsinx)²

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pankaj gupta
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Swapnil Saxena

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Answer Details:

Jan 01, 2012 02:59 AM

=x²cos(x)/(xsin(x))²

=x²cos(x)/x²sin(x)²

= cos(x)/sin²(x)

=cot(x)cosec(x)

Integrating it gives -cosec(x)

Definite Integral frm 0 to infiniity is cosec(0)+cosec(infinity) ---> undefined

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