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特別角的三角函數值(1)
Author:
藍邦偉 Blue
GeoGebra
New Resources
圓周公式的應用
直線的斜率
平行線的斜率
球体的体积推导（优化版）
兩位數加法
Discover Resources
Locus: Fixed Distance From Line Segment
包絡線
冰淇淋
Copy of 分數與小數
三角函數 週期、振幅變化 課堂投影用
Discover Topics
Logic
Fractal Geometry
Addition
Solids or 3D Shapes
Quadratic Equations