单位圆上的三角函数比值

GeoGebra 命令及参数

1. Sequence(Rotate[(r, 0), k°, (0, 0)], k, 0, 360) → list1
2. Point(list1) → P
3. Angle((1, 0), (0, 0), P) → θ
4. Circle((0, -0.004807882852143508), r) → c
5. Segment((0, 0), P) → a
6. Segment((0, 0), (x(P), 0)) → b
7. Segment(P, (x(P), 0)) → d
8. Midpoint(b) → A
9. Midpoint(d) → B
10. Midpoint(a) → C
11. Segment(E, E - (0, 0.025)) → i
12. Segment(F, F - (0, 0.025)) → j
13. Segment(G, G + (0.025, 0)) → k
14. Segment(H, H + (0.025, 0)) → l
15. Angle(P, (x(P), 0), (0, 0)) → α
16. Sequence(Rotate[(r, 0), k°, (0, 0)], k, 0, 360) → list1_1