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 Author Comment/Response Vijay Kumar 06/28/11 5:07pm Hi, I was evaluating a function with Mathematica 7 and found that using Integrate and NIntegrate gives me two different answers. I'm not sure which one to trust. This is the code I use: Z=1.8751; phi = Cosh[Z*s]-Cos[Z*s]+(Sin[Z*s]-Sinh[Z*s])*(Cosh[Z]+Cos[Z])/(Sin[Z]+Sinh[Z] ); Integrate[phi*D[phi,{s,2}]*Integrate[Integrate[(D[phi,{s,1}])^2,{s,0,s}],{s,1, s}],{s,0,1}] NIntegrate[phi*D[phi,{s,2}]*Integrate[Integrate[(D[phi,{s,1}])^2,{s,0,s}],{s, 1,s}],{s,0,1}] The first one gives an answer of -17.3646 and the second one gives -1.12795. Which one is correct? If someone could help me figure this one out, it would be great. Thanks Vijay URL: ,

 Subject (listing for 'Integrate & NIntegrate gives two different values') Author Date Posted Integrate & NIntegrate gives two different values Vijay Kumar 06/28/11 5:07pm Re: Integrate & NIntegrate gives two different ... jf 06/29/11 12:44pm Re: Integrate & NIntegrate gives two different ... Vijay Kumar 06/29/11 1:36pm
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