T133

a) sinα=0.6 tai sinα=-0.6

b) sinα=-0.5

A = Intersect(xAxis, yAxis)
c = Circle(A, 1)
f: x = -0.8
B, C = Intersect(c, f)
g = Segment(A, B)
h = Segment(A, C)
D = Intersect(c, xAxis, 2)
α = Angle(D, A, B)
β = Angle(C, A, D)
E = Intersect(c, yAxis, 1)
d = CircleArc(A, E, D)
i: x = sqrt(3) / 2
F = Intersect(c, d)
G = Intersect(d, i)