Integral

Pirkuliyev Rovsen

Evaluate $\int_{0}^{1}\frac{\arctan\frac{x}{x+1}}{\arctan\frac{1+2x-2x^2}{2}}$ maybe

_____________________________
Azerbaijan Land of the Fire ThumbUp

**Posted:** Sat Oct 31, 2009 3:23 am

mathxl

We can substitute x with 1-x.
Then we can add new integral to the origin and get as final result 1/2

**Posted:** Sat Oct 31, 2009 10:52 am

Dr Sonnhard Graubner

hello, i think this integral is not so easy.
Sonnhard.

**Posted:** Sat Oct 31, 2009 11:00 am

mathxl

After addition the numerator becomes equal to denominator with help of identity. So 2*integral=1

**Posted:** Sat Oct 31, 2009 11:03 am