三角函数识别与作图实践

GeoGebra 命令及参数

1. RandomElement(Sequence[i, i, 0, 345, 15]) → t
2. Random(4, 8) → a
3. Random(4, 8) → b
4. Polygon(O, A, B) → poly1, sideA, sideH, sideO
5. Angle(A, O, B) → α
6. Angle(O, A, B) → theta
7. Textfield(textAns1) → inputBox1
8. Textfield(textAns2) → inputBox2
9. Centroid(poly1) → P
10. RandomElement({"sin", "cos", "tan"}) → ratio
11. If(ratio ≟ "sin", correctSin, If[ratio ≟ "cos", correctCos, If[ratio ≟ "tan", correctTan]]) → correct
12. Shuffle({"a", "b", "c", "e", "f", "g", "h", "i", "k", "m", "n", "p", "r", "s", "t", "u", "w", "x", "y", "z"}) → listLetter