tan(x) > sin(x)
pi 3*pi (0, --) U (pi, ----) 2 2
x in Union(Interval.open(0, pi/2), Interval.open(pi, 3*pi/2))
/ / pi\ / 3*pi\\ Or|And|0 < x, x < --|, And|pi < x, x < ----|| \ \ 2 / \ 2 //
((0 < x)∧(x < pi/2))∨((pi < x)∧(x < 3*pi/2))