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三角函數with sine, cosine圖形
Author:
吳汀菱
,
Eric Chang-Chien
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
第八周作业
兩位數除以一位數（一）
異分母分數減法
球體建築師
Discover Resources
九點圓的真正面貌
Quiz on Solving Right Triangles (Finding Angles) 解直角三角形：測驗2（求角度）
Measuring Volume 4
y=Sin(x)伸縮平移
面積比化為向量比
Discover Topics
Symmetry
Cone
Algebra
Numbers
Random Experiments