诱导公式六（90°-α）的几何演示
2020-03-15 07:20
本 GeoGebra 范例动态演示了三角函数诱导公式六，即 90°-α 的正弦、余弦和正切值与 α 的三角函数值之间的关系。通过单位圆和直角三角形的几何构造，直观展示了 sin(90°-α)=cosα、cos(90°-α)=sinα 以及 tan(90°-α)=cotα 的推导过程。用户可以通过拖动滑块改变角度 α，实时观察三角函数线的长度和符号变化，从而加深对诱导公式几何意义的理解。
所属专题
中职数学GeoGebra互动教学资源库
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