三角函数比值 by Kevin Agnew

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(xAxis) → B
3. Circle(A, B) → c
4. Point(c) → C
5. Segment(A, C) → f
6. OrthogonalLine(C, xAxis) → g
7. Intersect(g, xAxis) → D
8. Segment(A, D) → h
9. Angle(C, A, D) → α
10. Angle(C, D, A) → β
11. Distance(f, g) → a
12. Segment(C, D) → l
13. Segment(C, D) → i
14. Segment(A, C) → j
15. Segment(C, D) → k
16. Segment(A, C) → m
17. Segment(A, D) → n
18. Segment(C, D) → q
19. Segment(A, D) → r