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两角和的正弦公式几何证明1
Author:
桃篮翁
GeoGebra
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兩位數加法
畫出對稱圖形
兩位數除以一位數(一)
球体的体积推导
三位數除以一位數(二)
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物體的體積
Lissajous curves(利薩如圖形)
蚂蚁爬行最短距离问题的副本
椭圆第一定义
S2 Chapter11.2 選擇適當的三角比
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Geometric Transformations
Parametric Curves
Ratios
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