旋转与参考角的三角函数比

GeoGebra 命令及参数

1. Intersect(c, xAxis, 2) → A
2. Intersect(xAxis, yAxis) → O
3. Segment(O, A) → a
4. Segment(O, P) → b
5. Angle(A, O, P) → α_+
6. Angle(A, O, P_o) → θ_c
7. Angle(P, O, A) → α_-
8. Intersect(c, xAxis, 1) → C
9. Segment(O, C) → d
10. Angle(C, O, P) → ReferenceAngle2
11. Angle(A, O, P) → ReferenceAngle1
12. If(ReferenceAngle1 ≟ 0°, 1, floor((θ_o - 0.01) / 90) + 1) → nquad
13. If(Mod[nquad, 4] ≟ 0, 4, Mod[nquad, 4]) → quad
14. Element(ListQuad, quad) → P_q
15. Polygon(O, P, Q) → poly1, p_x, o, p
16. Angle(O, Q, P) → rtAngled
17. Element(ListGenAngle, quad) → P_g
18. Element(ListRefAngle, quad) → P_f
19. Midpoint(O, Q) → OQmid
20. Midpoint(P, Q) → PQmid
21. Midpoint(O, P) → OPmid
22. Angle(A, O, P_o) → θ_{c2}
23. Angle(A, O, P_o) → θ_{c3}
24. Angle(A, O, P_o) → θ_{c4}
25. Intersect(b, p_x) → B
26. Textfield(θ_o) → inputBox1
27. Textfield(r) → inputBox2