I've corrected typing error in the integral.
I apologize for my mistake.
Reedited question:
Can anybody solve integral: ∫π20xln(sinx) dx ?
I'm just trying to guess some simple formula for ζ(3). My "strategy" is simple: Find some conjectures and check them numerically.
Value of similar integral is well known:
∫π0xln(sinx) dx=−ln(2)π22 .
Is there any idea for antiderivative of xln(sinx) ? It's to difficult to solve it for me.
Any ideas?
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