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cos, sin 與單位圓的副本
Author:
凯子巨人
,
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
找出對稱軸
画直线等分三角形的面积
異分母分數減法
兩位數除以一位數（一）
【案例】2013年安徽高考15题
Discover Resources
Construct a regular pentagon
畫三角形 題3b
task3
拋物線之極偶 / polarity for parabola
余弦定理的证明
Discover Topics
Integers
Secant Line or Secant
Diagrams
Square
Addition