eq1: (x + 2)^(2) + y^(2) = 1
B = Point(xAxis)
O = Intersect(xAxis, yAxis)
A = Point(eq1)
f = OrthogonalLine(A, xAxis)
A_x = Intersect(f, xAxis)
h = Segment(B, A_x)
i = Segment(A, B)
D = Intersect(eq1, xAxis, 2)
c_{1} = CircleArc(B, D, A)
α = Angle(D, B, A)
Cos: (α, x(A) + 2)
C: (α, 0)
c = Segment(O, C)
tekst1: "Nurk \;  α \; = \; " + (LaTeX[α]) + ""
a: cos(α)
tekst2: "Cos \; α \; =" + (LaTeX[a]) + ""