三角函数演示 by Godfrey Sovis

GeoGebra 命令及参数

1. Circle(A, B) → c
2. Point(c) → P
3. Angle(B, A, P) → α
4. Segment(B, A) → a
5. Segment(A, P) → b
6. OrthogonalLine(P, xAxis) → g
7. Intersect(g, xAxis) → Q
8. Segment(P, Q) → l
9. Segment(Q, A) → cos_1
10. Point(cos_1) → H
11. Point(l) → J
12. Intersect(c, xAxis, 1) → E
13. Intersect(c, yAxis, 2) → F
14. Intersect(c, yAxis, 1) → G
15. Segment(Q, A) → e
16. OrthogonalLine(B, xAxis) → f
17. Ray(A, P) → h
18. Intersect(f, h) → R
19. Segment(A, R) → i
20. Segment(R, B) → k
21. Point(k) → C