诱导公式四：原点对称的三角函数关系
2020-03-14 02:33
本范例演示三角函数诱导公式四，即关于原点对称的角之间的三角函数关系。通过在单位圆上构造点P及其关于原点的对称点P'，直观展示sin(π+θ)=-sinθ、cos(π+θ)=-cosθ、tan(π+θ)=tanθ等公式的几何意义。利用Mirror命令实现原点对称变换，结合滑块动态调整角度θ，实时观察正弦、余弦、正切值的变化规律，帮助学生从几何视角深入理解诱导公式的本质与推导过程。
所属专题
中职数学GeoGebra互动教学资源库
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