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Integral Calculus

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6 Nov 2007 17:37:42 IST

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integral x*secx dx

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Im try u=x;dv=secx; or u=secx, dv=x; or u=x*secx, dv=dx; but always the answer is: 0=0, please what can i do??

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pradnya pednekar

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Joined: 24 Oct 2007

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6 Nov 2007 20:24:45 IST

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I DIDN'T GET UR QUESTION? DO U WANT TO KNOW FOR X SECX

astrojith

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Joined: 5 Jun 2007

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8 Nov 2007 19:41:12 IST

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Hmm... seems that it is kinda confusing. Hang on while I ask my tutor about this.

astrojith

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Posts: 336

11 Nov 2007 19:34:03 IST

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Hey, substitute t=tan x/2 and so, cos x = (1-t²) / (1+t²). You'll get the answer. Hope that helped. Rate me if it did. :)

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