三角函数图像绘制练习：探索正弦与余弦函数特性

GeoGebra 命令及参数

1. Textfield(a) → i1
2. Textfield(b) → i2
3. Textfield(c) → i3
4. Textfield(d) → i4
5. Textfield(f) → i6
6. Textfield(g) → i7
7. Mode(l1) → l2
8. Dilate(A, If[0 < j ≤ 1, 1 - j, 0], D) → A'
9. Vector(A, A') → u
10. Textfield(k) → i8
11. Textfield(l) → i9
12. Length(If[Length[l2] ≟ 0, "No digits repeat!", "You have repeated digits."]) → m
13. If(Length[l2] ≟ 0, "No digits repeat!", "You have repeated digits.") → text3