
#1
Feb110, 06:29 PM

P: 2

[tex]
\int_0^{\pi} \frac{x}{1+\sin(x)\cos(x)} dx [/tex] 



#2
Feb110, 06:35 PM

P: 2

how does latex in this forum works???? how to get rid of the 18416 ?????
testing [tex]\frac{1}{2}[/tex] [tex]\int_0^{\pi} \frac{x}{1+\sin(x)\cos(x)} dx[/tex] 



#4
Feb410, 11:16 AM

P: 61

A Hard integral
what is the method used?




#5
Feb410, 06:50 PM

PF Gold
P: 1,236

This is not a competition. I had the answer the minute I looked at the problem to make sure it existed. The point is to teach him how to find the solution by looking at his attempt at the solution. Please dont randomly post an answer which does not help him in any way.
To OP: for what its worth, sin(2*x) = 2*sin(x)*cos(x). You can try u=2*x, du = 2 dx 


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