单位圆与三角函数 by Mario

GeoGebra 命令及参数

1. Circle(A, B) → c
2. Point(c) → P
3. OrthogonalLine(A, yAxis) → a
4. OrthogonalLine(P, a) → b
5. OrthogonalLine(P, yAxis) → d
6. Segment(A, P) → e
7. Intersect(yAxis, d) → C
8. Intersect(b, a) → D
9. Segment(P, C) → cosθ
10. Segment(D, P) → sinθ
11. Tangent(P, c) → h,
12. Intersect(yAxis, h) → E
13. Intersect(a, h) → F
14. Segment(F, A) → secθ
15. Segment(A, E) → cscθ
16. Segment(P, E) → cotθ
17. Segment(P, F) → tanθ
18. Angle(P, A, B) → θ
19. Polygon(P, A, D) → poly1, d_1, p, a_1
20. Vector(A, G) → u
21. Translate(P, u) → P'
22. Translate(A, u) → A'
23. Translate(D, u) → D'
24. Polygon(P', A', D') → poly1', d', cosθ_1, sinθ_1
25. Angle(P', A', D') → θ_1