单位圆中的正弦比

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Circle(A, B) → c
3. Point(c) → C
4. Segment(C, A) → a
5. Line(C, yAxis) → b
6. OrthogonalLine(A, yAxis) → d
7. Intersect(b, d) → D
8. Segment(C, D) → e
9. Midpoint(D, C) → E
10. Intersect(c, d, 1) → F
11. Angle(F, A, C) → α
12. Midpoint(C, A) → G
13. Polygon(H, I, 4) → poly1, h, i, f, g, J, K
14. Polygon(H_1, I_1, 4) → poly1_1, h_1, i_1, f_1, g_1, J_1, K_1
15. Polygon(H_2, I_2, 4) → poly1_2, h_2, i_2, f_2, g_2, J_2, K_2
16. Polygon(H_3, I_3, 4) → poly1_3, h_3, i_3, f_3, g_3, J_3, K_3
17. Segment(A, D) → j