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以 Unit Circle 了解 Sine 的正/負的副本
Author:
zhujianpeng
,
gklwong
以 Unit Circle 了解 Sine 的正/負
GeoGebra
New Resources
畫出對稱圖形
球體建築師
異分母分數減法
三位數除以一位數（一）
三位數除以一位數（二）
Discover Resources
Positive angles & Negative angles
number line
體積的量度 1
滑桿動態指令(動畫根本指令)
線性規劃
Discover Topics
Triangles
Incircle or Inscribed Circle
Arithmetic Mean
Subtraction
Plane Figures or Shapes