三角形与圆中的三角函数值

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) → radius
6. Tangent(C, c) → b,
7. Intersect(b, xAxis) → D
8. Intersect(yAxis, b) → E
9. Angle(B, A, C) → α
10. Radius(c) → r
11. OrthogonalLine(C, xAxis) → j
12. Intersect(j, xAxis) → F
13. Segment(A, F) → cosine
14. Segment(F, C) → sine
15. Segment(A, E) → cosecant
16. Segment(C, D) → tangent_1
17. Segment(C, E) → cotangent_1
18. Segment(A, D) → secant
19. Angle(C, F, A) → β
20. Segment(C, F) → vertical
21. Line(A, C) → l
22. Intersect(l, k) → G
23. Segment(If[x(C) ≥ 0, B, ((-x(B)), 0)], G) → tangent_2
24. OrthogonalLine(G, yAxis) → n
25. Intersect(n, yAxis) → H
26. Segment(H, G) → cotangent_2
27. Segment(A, G) → i