pi (--, 2) 2
3*pi (----, 1/2) 2
(-oo, pi/2] U [3*pi/2, oo)
[pi/2, 3*pi/2]
(-oo, 2*atan((-sqrt(2)*sqrt(1 + sqrt(1 + 4*log(2)**2)) + 1 + sqrt(1 + 4*log(2)**2))/(2*log(2)))] U [2*atan((1 + sqrt(1 + 4*log(2)**2) + sqrt(2)*sqrt(1 + sqrt(1 + 4*log(2)**2)))/(2*log(2))), oo)
[2*atan((-sqrt(2)*sqrt(1 + sqrt(1 + 4*log(2)**2)) + 1 + sqrt(1 + 4*log(2)**2))/(2*log(2))), 2*atan((1 + sqrt(1 + 4*log(2)**2) + sqrt(2)*sqrt(1 + sqrt(1 + 4*log(2)**2)))/(2*log(2)))]