单位圆上任意角的正弦与余弦（超越0到2π）

GeoGebra 命令及参数

1. CurveCartesian(cos(a), sin(a), a, 0, 6.283185307179586) → c
2. CurveCartesian(((1 / 20 + a / 200) * cos(a)), ((-(1 / 20 + a / 200)) * sin(a)), a, 0, u) → b
3. Intersect(xAxis, yAxis) → D
4. Point(c) → E
5. CircleArc(D, E, C) → e
6. OrthogonalLine(C, xAxis) → f
7. Intersect(f, xAxis) → F
8. Polygon(C, D, F) → poly1, f_1, c_1, d_1
9. If(π / 2 < e < (2 * π), Polygon[D, (abs(x(C)), abs(y(C))), (abs(x(F)), abs(y(F)))]) → poly2
10. Textfield(w) → increment
11. Intersect(e, i, 2) → G
12. Intersect(e, g, 2) → H
13. Intersect(e, h, 2) → I
14. Intersect(e, k, 1) → J
15. Intersect(e, m, 1) → K
16. Intersect(e, l, 1) → L
17. Intersect(e, n, 1) → M
18. Intersect(e, j, 1) → N
19. Intersect(e, i, 1) → O
20. Intersect(e, g, 1) → P
21. Intersect(e, h, 1) → Q
22. Intersect(e, k, 2) → R
23. Intersect(e, m, 2) → S
24. Intersect(e, l, 2) → T
25. Intersect(e, n, 2) → U
26. Intersect(e, j, 2) → V
27. CurveCartesian(((1 / 20 + a / 200) * cos(a)), ((1 / 20 + a / 200) * sin(a)), a, 0, t) → a
28. CircleArc(D, A_1, Z) → q
29. Intersect(q, l, 1) → W
30. Intersect(q, m, 1) → B_1
31. Intersect(q, n, 1) → C_1
32. Intersect(q, j, 1) → D_1
33. Intersect(q, i, 1) → E_1
34. Intersect(q, g, 1) → F_1
35. Intersect(q, h, 1) → G_1