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相向而行的兩行進波
Author:
ipc Wang
f(x,t)=sin(3x-2t) g(x,t)=sin(3x+2t)
GeoGebra
New Resources
Earth with coastline
畫出對稱圖形
算柱 (兩位數)
近似值：有效數字
幾何作圖題：切三圓（題目）
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p9pppppppppppppppp
這是什麼圖形？
ghseh 二次函數描點法左右平移-4
ggb 優良作品 _10
tan90
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Similar Triangles
Conic Sections
Plane Figures or Shapes
Fractal Geometry
Straight Lines