复平面上的轨迹与辐角

GeoGebra 命令及参数

1. Ray(z_1, Vector[(cos(A), sin(A))]) → f
2. Ray(z_1, Vector[(cos(B), sin(B))]) → g
3. If(lb, strict, nstrict) → lbt
4. If(ub, strict, nstrict) → ubt
5. Ray(z_1, Vector[(cos(A), sin(A))]) → f_1
6. Ray(z_1, Vector[(cos(B), sin(B))]) → g_1
7. If(B - A < π, If[abs(A) < π / 2, y > f(x), y < f(x)] ∧ If[abs(B) < π / 2, y < g(x), y > g(x)], If[abs(A) < π / 2, y > f(x), y < f(x)] ∨ If[abs(B) < π / 2, y < g(x), y > g(x)]) → a
8. Ray(z_1, Vector[(1, 0)]) → h
9. Angle(h, g) → β
10. Angle(h, f_1) → α