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基本三角函數
Author:
Ching-Hui Chou
GeoGebra
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判斷球體
球體建築師
球体的体积推导(优化版)
拼砌四邊形
第八周作业
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Copy of 和差角公式几何证明
橢圓1-同心圓法
橢圓2-四圓心近似法
圆锥曲线的第二定义的副本
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Kite
Arithmetic
Vectors
Indefinite Integral
Quadratic Functions