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y=Asin(wx+φ)的图象
Author:
军云
GeoGebra
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垂直線的斜率
直線的斜率
【案例】圆柱体内放置一个大球六个小球
球体的体积推导（优化版）
双心四边形
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Rectangle _03
play tennis
香港的硬幣
滑桿動畫基礎
三角函數 週期、振幅變化 課堂投影用
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Orthocenter
Cosine
Calculus
Parametric Curves
Geometric Distribution