On Sunday, May 13, 2012 8:46:41 PM UTC-7, ketchers wrote:
>
> Sage returns negative value for the integral of a positive function
> x*cos(x^3) on (0,0.5), if I use abs(cos(x^3))*x, then it gets it correct?
>
>
This works for me:
sage: numerical_integral(x*cos(x^3), 0, 0.5)
(0.1247560409610376, 1.3850702913602309e-15)
--
John
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