I = Intersect(xAxis, yAxis)
c = Circle(I, 1.0)
α = 1.0471975511965976 rad (slider from 0 to 6.283185307179586, step 0.017453292519943295)
P: (cos(α), sin(α))
a = Segment(P, I)
Text_sin: "sin α =" + (sin(α))
Text_cos: "cos α = " + (cos(α))