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三角函数的基础知识
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三角函数的基础知识

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Questions and Answers

三角函数通常是如何定义的？

  • 无穷级数
  • 单位圆上的各种线段的长度
  • 包含这个角的直角三角形的两个边的比率 (correct)
  • 特定微分方程的解

    • 三角函数在研究什么方面是很重要的？

  • 平行四边形性质
  • 椭圆的属性
  • 立方体的特征
  • 三角形和周期现象 (correct)

    • 最现代的定义把三角函数表达为什么？

  • 无穷级数
  • 特定微分方程的解 (correct)
  • 单位圆上的各种线段的长度
  • 直角三角形的两个边的比率

    • 三角函数允许扩展到哪些值？

    <p>任意正数和负数值，甚至是复数值</p> Signup and view all the answers

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