1 / | | 2 | x*acot (x) dx | / 0
1 / | 2 | 2 log(2) pi pi | x*acot (x) dx = ------ - --- + -- | 2 16 4 / 0
0.515121478609336
/ | 2 / 2\ 2 2 | 2 acot (x) log\1 + x / x *acot (x) | x*acot (x) dx = C + -------- + ----------- + x*acot(x) + ----------- | 2 2 2 /