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Cosine function
Author:
Hsin Han Wang
GeoGebra
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平行線的斜率
探究三角形的全等條件
球体的体积推导
多邊形的面積
兩位數加法
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lim sin(x)/x = 1
平行線
circle
(001)80102史巧薇
選修數學
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Ellipse
Equations
Arithmetic Operations
Subtraction
Matrices