正弦角和

GeoGebra 命令及参数

1. Intersect(c, xAxis, 2) → B
2. Point(c) → C
3. Point(c) → D
4. Intersect(xAxis, yAxis) → A
5. Segment(A, B) → f
6. Segment(A, C) → g
7. Segment(A, D) → h
8. Angle(B, A, C) → α
9. Angle(C, A, D) → β
10. If(a < 1, Segment[D, (x(D), y(D) - (y(D) * a))], Segment[D, (x(D), 0)]) → i
11. Intersect(f, i) → E
12. Angle(B, E, D) → γ
13. OrthogonalLine(D, g) → j
14. Intersect(j, g) → F
15. If(1.5 < a < 2.5, Segment[D, (x(D) + ((a - 1.5) * (x(F) - x(D))), y(D) + ((a - 1.5) * (y(F) - y(D))))], a ≥ 2.5, Segment[D, F]) → k
16. Angle(C, F, D) → δ
17. If(3 < a < 4, Segment[F, (x(F), y(F) - (y(F) * (a - 3)))], a ≥ 4, Segment[F, (x(F), 0)]) → l
18. Intersect(f, l) → G
19. Angle(B, G, F) → ε
20. If(4.5 < a < 5.5, Segment[F, (x(F) - ((x(F) - x(E)) * (a - 4.5)), y(F))], a ≥ 5.5, Segment[F, (x(E), y(F))]) → m
21. Intersect(i, m) → H
22. Angle(F, H, D) → ζ
23. Angle(H, F, A) → η
24. Angle(H, D, F) → θ