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根據百分率找數量（二）: 例3

Author:: GeoGebra Institute of Hong Kong

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导数
y=sin x->y=sin(2x+pi/3)
正方体展开图
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探索三角函数的图像

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固定三角形的條件−題1
直線的投影量
層層套疊的四邊形
幾何明珠2-5
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