三角函数与单位圆 by David O'Sullivan

GeoGebra 命令及参数

1. Point(c) → A
2. Intersect(xAxis, yAxis) → B
3. Intersect(c, xAxis, 2) → C
4. Angle(C, B, A) → α
5. Turtle() → turtle1
6. Segment(B, A) → g
7. Rotate(J, 0°, K) → J'
8. Angle(J, K, J') → δ
9. Intersect(c, yAxis, 2) → L
10. CircleSector(B, C, L) → e
11. Intersect(c, xAxis, 1) → M
12. CircleSector(B, L, M) → h
13. Intersect(c, yAxis, 1) → N
14. CircleSector(B, M, N) → k
15. CircleSector(B, N, C) → p
16. Point(yAxis) → O
17. Point(yAxis) → Z
18. Polygon(Z, W, P, O) → poly1, z_1, w, p_1, o
19. Polygon(P, W, V, Q) → poly2, p_2, w_1, v, q
20. Polygon(Q, V, U, R) → poly3, q_1, v_1, u, r
21. Polygon(R, U, T, S) → poly4, r_1, u_1, t, s
22. Point(p) → A_1
23. Segment(A_1, M) → m
24. OrthogonalLine(A, m) → n
25. Intersect(h, n, 1) → B_1
26. Intersect(h, k, 1) → C_1
27. Intersect(m, n) → D_1
28. Segment(A, D_1) → f_1
29. Segment(D_1, B) → g_1
30. Point(m) → E_1