动态几何：探索几何图形与三角函数的关系

GeoGebra 命令及参数

1. Vector((a, 0)) → a_x
2. Vector((a, 0), (a, b)) → v
3. Vector((a, 0), (a, (2 * b))) → w
4. Vector((0, 0), (a, (2 * b))) → d
5. Vector((0, 0), (a, b)) → b_h
6. Vector((0, 0), (a, b / 2)) → m
7. Point(w) → B
8. Vector((a - (a * 0.25), 8^(0.5)), (a + 1.14, 8^(0.5))) → u
9. Point(u) → A
10. Point(u) → C
11. Circle(C, A) → q
12. Circle(C, B) → f
13. Distance(C, A) → distanceCA
14. Vector((a, 0), (a, (3 * b))) → i
15. Textfield(a) → InputBox1
16. Point(m) → L
17. Point(i) → M
18. Point(h) → N
19. Point(f) → E
20. Segment(E, N) → j
21. Segment(O, N) → l
22. Segment(E, B) → n
23. Segment(M, N) → s
24. Point(k) → P
25. Segment(M, A) → t
26. Segment(A, P) → a_1
27. Vector((o, 0)) → u_1
28. Vector((0, o)) → v_1
29. Vector((o, 0), (0, o)) → w_1
30. Point(u_1) → R
31. Point(a_x) → Q
32. Segment(R, Q) → c_1
33. Segment(O, R) → d_1
34. Segment(O, Q) → e_1
35. Intersect(f, j, 1) → H
36. Point(v) → S
37. Point(h) → T
38. Point(p) → U
39. Segment(T, U) → k_1
40. Point(q) → V
41. Segment(S, V) → j_1
42. Point(j_1) → A_1
43. Point(j_1) → W
44. Point(b_h) → Z
45. Segment(Z, W) → l_1
46. Segment(A_1, Z) → m_1
47. Intersect(h, j, (1.5461331510122753, 4.693286817704803)) → C_1
48. Point(h) → B_1
49. Textfield(B_1) → InputBox2
50. Point(Circle[C_1, 1]) → D_1
51. Segment(C_1, D_1) → n_1
52. Point(h) → E_1
53. Distance(B_1, D_1) → distanceB1D1
54. Point(j) → F_1
55. Line(F_1, j) → p_1
56. Point(p_1) → G_1
57. Point(p_1) → H_1
58. Segment(H_1, G_1) → q_1
59. Point(Circle[I_1, 1.82]) → J_1
60. Segment(I_1, J_1) → r_1