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15°三角函数值表

15°三角函数值表
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2015-11-28 21:35
圆角函数三角函数几何作图
①本范例演示了三角函数在15°等关键角度下的函数值，并强调了单位圆上的重要数值；②涉及的核心数学概念包括三角函数、单位圆、三角恒等式、余函数等；③作图要点提炼自构造摘要，使用了If条件判断、TableText文本表格、Intersect交点计算等GeoGebra命令与对象α、texSin等；④适合高中阶段学习三角函数、单位圆及三角恒等式的学生使用，也可用于教学演示。

GeoGebra 命令及参数

  1. If(Defined[cot(α)], texCot, "cot(" + α + ") is undefined.") → texCot0
  2. If(Defined[csc(α)], texCsc, "csc(" + α + ") is undefined.") → texCsc0
  3. If(Defined[tan(α)], texTan, "tan(" + α + ") is undefined.") → texTan0
  4. If(Defined[sec(α)], texSec, "sec(" + α + ") is undefined.") → texSec0
  5. TableText({{" Trigonometric Values ", texSin, texCos, texTan0, texCot0, texSec0, texCsc0}}, "|_v") → text1
  6. Intersect(sine, a, (130.13722126929676, 0.7645027951227927)) → A
  7. Intersect(cosine, a, (130.13722126929676, -0.644620412529294)) → B
  8. Intersect(tangent, a, (130.13722126929676, -1.1859736059600048)) → C
  9. Intersect(secant, a, (130.13722126929676, -1.5513005492275753)) → E
  10. Intersect(cosecant, a, (130.13722126929676, 1.3080396911294252)) → F
  11. Intersect(cotangent, a, (130.13722126929676, -0.8431890853005405)) → D