a = CurveCartesian(0, s, ((-1 / π * s) * (s - (2 * π))), s, 0, (2 * π))
b = CurveCartesian(6, t, sin(t), t, 0, (2 * π))
c = Surface(((1 - t) * 6) + 0, ((1 - t) * s) + (t * s), ((1 - t) * sin(s)) - ((t / π * s) * (s - (2 * π))), s, 0, (2 * π), t, 0, 1)
A = (-0.22830782719150983, 1.6484579800462387)
B = (0.27106613073449115, 1.6484579800462387)