单位圆 by nnhsmath

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(yAxis) → B
3. Circle(A, B) → c
4. Intersect(c, xAxis, 2) → C
5. Rotate(C, 29.999999999999996°, A) → C'
6. Rotate(C, 45°, A) → C'_1
7. Rotate(C, 59.99999999999999°, A) → C'_2
8. Mirror(C', xAxis) → C''
9. Mirror(C'_1, xAxis) → D
10. Mirror(C'_2, xAxis) → E
11. Mirror(C'_2, yAxis) → F
12. Mirror(C'_1, yAxis) → G
13. Mirror(C', yAxis) → C''_1
14. Mirror(E, yAxis) → E'
15. Mirror(D, yAxis) → D'
16. Mirror(C'', yAxis) → C'''
17. Intersect(c, xAxis, 1) → H
18. Intersect(c, yAxis, 2) → I
19. Rotate(C, α, A) → C'_3
20. Angle(Z, A, C'_3) → β
21. Segment(A, C'_3) → f
22. Segment(C'_3, J) → g
23. Segment(A, J) → h
24. If(abs(sin(α)) ≟ 0.5 ∨ abs(cos(α)) ≟ 0.5 ∨ cos(α) ≟ 0 ∨ abs(sin(α)) ≟ 1 ∨ abs(sin(α)) ≟ sqrt(2) / 2, true, false) → d
25. Polygon(A, J, C'_3) → poly1, c'_3, a_1, j