单位圆与正弦、余弦、正切的联系

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Circle(A, B) → c
3. Point(c) → C
4. OrthogonalLine(C, xAxis) → b
5. OrthogonalLine(C, yAxis) → d
6. Intersect(d, yAxis) → D
7. Intersect(b, xAxis) → E
8. Vector(A, C) → u
9. Angle(B, A, C) → ϕ
10. Segment(D, C) → a
11. Segment(E, C) → e
12. Line(B, yAxis) → f
13. Line(A, C) → g
14. Intersect(f, g) → F
15. Segment(A, E) → i
16. Segment(B, F) → j
17. LaTeX(ϕ, true, true) → Text1
18. Function(sin(x - x(G)), x(G), x(J)) → h
19. Function(cos(x - x(G)), x(G), x(J)) → r
20. Function(tan(x - x(G)), x(G), x(J)) → s
21. Segment(A, F) → k