asksign: integrate(sin(x)/(cos(x))^2,x,%pi/6, %pi/4)

• Subject: asksign: integrate(sin(x)/(cos(x))^2,x,%pi/6, %pi/4)
• From: Richard Fateman
• Date: Fri, 26 Jun 2009 15:02:02 -0700

Mike Hansen wrote:
> ..
> (%i2) integrate(cos(x)/(sin(x))^2,x,%pi/6,%pi/4);
> Is  sin(x)  positive, negative, or zero?
>
>   
A bug.  Maybe you would like to look at the source code and fix it!?

Commercial Macsyma gives sqrt(2) - ((2 * sqrt(3))/3)
RJF

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