A = Point(xAxis)
B = Point(xAxis)
c = Circle(A, B)
C = (-4.247826237941736, 1.282744958736606)
a = Segment(A, C)
b = OrthogonalLine(C, xAxis)
D = Intersect(b, xAxis)
poly1, d, a_1, c_1 = Polygon(A, C, D)
α = Angle(B, A, C)
E = Intersect(c, d)
e = OrthogonalLine(E, xAxis)
F = Intersect(xAxis, e)
poly2, f, sine, e_1 = Polygon(A, E, F)
G: (α, 0)
g = OrthogonalLine(G, xAxis)
h = OrthogonalLine(E, g)
i = OrthogonalLine(C, g)
H = Intersect(g, h)
I = Intersect(g, i)
j: 1 / (1 + ℯ^(f - d))