向量分解为i和j分量助记

GeoGebra 命令及参数

1. Point(xAxis) → H'
2. Point(yAxis) → H
3. Line(H, H') → a
4. Intersect(xAxis, yAxis) → O
5. OrthogonalLine(O, a) → b
6. Angle(H', H, O) → B
7. Angle(O, H', H) → A
8. Vector((sin(A), (-cos(A)))) → wc
9. Vector((cos(B), (-sin(B)))) → wc'
10. Vector((cos(A), sin(A))) → wa
11. Vector((sin(B), cos(B))) → wa'
12. Vector(((-sin(A)), cos(A))) → ws
13. Vector(((-cos(B)), sin(B))) → ws'
14. Vector(((-cos(A)), (-sin(A)))) → wt
15. Vector(((-sin(B)), (-cos(B)))) → wt'
16. Angle(Wc, O, H') → B'
17. Angle(H', O, Wa) → A'