________ / 2 \/ 1 - x < 1
sqrt(1 - x^2) < 1
[-1, 0) U (0, 1]
x in Union(Interval.Ropen(-1, 0), Interval.Lopen(0, 1))
Or(And(-1 <= x, x < 0), And(x <= 1, 0 < x))
((-1 <= x)∧(x < 0))∨((x <= 1)∧(0 < x))