角度转换为弧度示例

角度转换为弧度示例
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2014-05-13 20:32
①本范例演示了如何将78度转换为弧度,并展示精确值与近似值;②涉及核心数学概念包括角度单位转换、三角函数基本公式;③构造摘要中用到了LaTeX, GCD, stepMax, stepper, steps, counter, text0, angleDeg, angleRad, text1, text4, text6, text7, gcf, numer, denom, text10, text11, button1, button2, text14, Problem, text3, text12, text13, text8, text2, text9, text5等GeoGebra命令/对象;④适合高中数学学生学习和理解角度与弧度之间的转换关系。

GeoGebra 命令及参数

  1. LaTeX(steps) → counter
  2. LaTeX("\text{Determine which conversion factor to use.}") → text1
  3. LaTeX("\text{Set up the multiplication.}") → text4
  4. LaTeX("\text{Multiply, and cancel out the degree symbols.}") → text6
  5. LaTeX((("\textcolor{#000099}{\frac{" * angleDeg) * "\pi}{180}}")) → text7
  6. GCD(angleDeg, 180) → gcf
  7. LaTeX("\text{Use your calculator to find the measure of the angle as a decimal.}") → text10
  8. LaTeX((((((("\textcolor{#000099}{\frac{" * numer) * "\pi}{") * denom) * "}\approx") * angleRad) * "}")) → text11
  9. LaTeX("\text{Use the buttons below to return to the original problem or}\cr\text{randomly generate a similar practice problem.}") → text14
  10. LaTeX((("\text{Convert " * angleDeg) * "° to radians.}")) → Problem
  11. LaTeX((("\text{Multiply " * angleDeg) * "° by the conversion factor.}")) → text3
  12. LaTeX((((("\text{Converted to radians, the decimal measure of " * angleDeg) * "° is}\cr\text{approximately ") * angleRad) * " radians.}")) → text12
  13. LaTeX((((("\text{Recall that radians compare the value of the arc length to the value of}\cr\text{the radius; therefore, for this " * angleDeg) * "° angle, the arc length is approximately}\cr\text{") * angleRad) * " times the length of the radius.}")) → text13
  14. LaTeX("\text{Reduce the fraction, if possible.}") → text8
  15. LaTeX("\text{Recall that }\pi\text{ radians = 180°. Thus, }\frac{\pi\text{ }radians}{180°}\text{ = 1, since dividing}\cr\text{one quantity by its equivalent is equal to 1. Since degrees need to be}\cr\text{converted to radians, multiply by }\frac{\pi}{180°}\text{ so that the degrees in the}\cr\text{denominator will cancel out and radians will remain.}") → text2
  16. LaTeX((((((((((("\text{The greatest common factor of }\textcolor{#000099}{" * angleDeg) * "}\text{ and }\textcolor{#000099}{180}\text{ is }\textcolor{#000099}{") * gcf) * "}\text{, so the reduced}\cr\text{form of the exact measure of }\textcolor{#000099}{") * angleDeg) * "°}\text{ in radians is }\textcolor{#000099}{\frac{") * numer) * "\pi}{") * denom) * "}}.")) → text9
  17. LaTeX((("\textcolor{#000099}{" * angleDeg) * "^{\circ}\bullet\frac{\pi}{180^{\circ}}}")) → text5

AI 绘图提示语参考

绘制一个数学教学图形,展示78度转换为弧度的过程。包含文本说明步骤,如'确定使用哪个转换因子'、'设置乘法'、'乘积并消去度数符号',以及精确值和近似值。显示角度单位转换公式,用π表示的精确弧度值和计算出的近似弧度值。用按钮控制返回原问题或生成新问题,并标注π弧度等于180度,强调弧长与半径的关系。
以上提示语为根据原始绘图命令整理而来,仅供参考。