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两角和的正弦公式
Author:
zhang hongwei
Topic:
Trigonometric Functions
GeoGebra
New Resources
錐體建築師
兩組對邊相等和有直角的四邊形
判斷球體
畫出對稱圖形
三位數除以一位數（二）
Discover Resources
Sequence指令練習(逐一套疊三角形)
優良作品2
錯角練習
Gazing Cow Problem (c)
數量與整體的相差百分率的副本
Discover Topics
Fractal Geometry
Special Points
Right Triangles
Binomial Distribution
Complex Numbers