30n°角的正弦与余弦几何构造与数值演示

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(xAxis) → B
3. Circle(A, B) → c
4. Intersect(c, f, 1) → C
5. Intersect(c, f, 2) → D
6. Intersect(c, g, 2) → E
7. Intersect(c, g, 1) → F
8. Mirror(E, xAxis) → E'
9. Mirror(F, xAxis) → F'
10. Mirror(C, yAxis) → C'
11. Mirror(D, yAxis) → D'
12. Intersect(c, xAxis, 2) → G
13. Intersect(c, yAxis, 2) → H
14. Intersect(c, yAxis, 1) → I
15. Segment(A, E) → j
16. Segment(A, E') → k
17. Segment(E, E') → l
18. Polygon(A, C', C) → poly2, n, p, q
19. Polygon(A, E', E) → poly1, e, a, e'
20. Segment(G, C') → m
21. Polygon(A, F, F') → poly4, f', a_3, f_1
22. Polygon(D, D', A) → poly5, r, s, t
23. Segment(A, B) → b
24. Segment(A, H) → d
25. Segment(G, A) → g_1
26. Segment(A, I) → h_1
27. Intersect(i, l) → J
28. Segment(A, J) → i_1
29. Angle(E, J, A) → α
30. Intersect(h, p) → K
31. Segment(K, A) → j_1
32. Angle(C', K, A) → β
33. Intersect(i, a_3) → L
34. Segment(L, A) → k_1
35. Angle(F', L, A) → γ
36. Intersect(h, r) → M
37. Segment(A, M) → l_1
38. Angle(D, M, A) → δ
39. Polygon(P, N, O, Q) → poly3, p_1, n_1, o, q_1
40. Polygon(P_1, N_1, O_1, Q_1) → poly3_1, p_2, n_2, o_1, q_2
41. Polygon(P_2, N_2, O_2, Q_2) → poly3_2, p_3, n_3, o_2, q_3
42. Polygon(P_3, N_3, O_3, Q_3) → poly3_3, p_4, n_4, o_3, q_4
43. Polygon(P_4, N_4, O_4, Q_4) → poly3_4, p_5, n_5, o_4, q_5
44. Polygon(P_5, N_5, O_5, Q_5) → poly3_5, p_6, n_6, o_5, q_6
45. Polygon(P_6, N_6, O_6, Q_6) → poly3_6, p_7, n_7, o_6, q_7
46. Polygon(P_7, N_7, O_7, Q_7) → poly3_7, p_8, n_8, o_7, q_8
47. Polygon(P_8, N_8, O_8, Q_8) → poly3_8, p_9, n_9, o_8, q_9
48. Polygon(P_9, N_9, O_9, Q_9) → poly3_9, p_{10}, n_{10}, o_9, q_{10}
49. Polygon(P_{10}, N_{10}, O_{10}, Q_{10}) → poly3_{10}, p_{11}, n_{11}, o_{10}, q_{11}
50. Polygon(P_{11}, N_{11}, O_{11}, Q_{11}) → poly3_{11}, p_{12}, n_{12}, o_{11}, q_{12}