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-1/8 ≤ cosα cosβ cosγ ≤ 1
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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兩位數加法
找出對稱軸
【案例】2013年安徽高考15题
判斷球體
錐體建築師
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指數函數的平移 (3)
圓周 (圖形I)
sinα + sinβ > 0 ?
立體
画直线等分三角形的面积
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Parallelogram
Dilation
Definite Integral
Equations
Conic Sections