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三角函數with sine, cosine圖形
Author:
Eric Chang-Chien
GeoGebra
New Resources
直角坐標平面上的旋轉變換
長方體平面投影 (Codex版)
算柱 (兩位數)
近似值：有效數字
Earth with coastline
Discover Resources
正方形與正三角形
正弦與餘弦值的大小關係
三角形的底和高
函数作图工具的副本
海螺
Discover Topics
Right Triangles
Solids or 3D Shapes
Unit Circle
Quadrilaterals
Diagrams