两角和的正切公式几何证明
2020-04-10 00:39
本GeoGebra范例通过几何作图直观演示了两角和的正切公式的几何证明过程。利用直角三角形、圆、射线及正交线等几何元素，构造出包含角α和β的图形，并通过线段比例关系推导出正切和角公式。该动态模型有助于学生深入理解三角函数恒等式的几何本质，将代数运算与几何图形完美结合，是三角函数教学与学习的优质可视化辅助工具。
所属专题
中职数学GeoGebra互动教学资源库
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