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两角和的余弦公式几何证明
Author:
桃篮翁
GeoGebra
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兩組對邊相等的四邊形
錐體建築師
三位數除以一位數(二)
兩位數除以一位數(二)
【案例】2018年全国1卷理科12题
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內擺線
折扣 例5
旋轉動畫
Apollonius Problem 8 CLL homo 12
運用搬移方法找出平均數
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Means
Sine
Differential Equation
Calculus
Piecewise Functions