正弦与余弦表：几何与三角函数的直观展示

GeoGebra 命令及参数

1. Rotate(D, 355*°, A) → D'
2. CircleArc(A, D, D') → c_1
3. Point(c_1) → C
4. Circle(A, d) → f
5. Segment(A, C) → b
6. Rotate(C, α, A) → C'
7. Ray(A, C') → b_1
8. Intersect(f, b_1, 1) → B
9. Segment(B, C) → a
10. Segment(B, A) → c
11. Angle(A, C, B) → γ
12. Angle(C, A, B) → δ
13. Midpoint(c) → E
14. Midpoint(b) → F
15. Midpoint(a) → G