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Old 2009-08-02, 01:43   #1
sma4
 

111568 Posts
Default integration problem

Can anyone help me with this

integral of sqrt(1+sin^2 x)

it's been bothering me for the past few days, i've tried using substitution but with little success, and i don't think partial integration does the trick
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Old 2009-08-02, 04:35   #2
frmky
 
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Jul 2003
So Cal

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This integral has no closed form solution. Look up the elliptic integrals.
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Old 2009-08-02, 14:08   #3
moebius
 
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Jul 2009
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WolframAlpha solution:


http://www73.wolframalpha.com/input/...2Bsin%5E2+x%29
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