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两角和的正弦公式
Author:
zhang hongwei
Topic:
Trigonometric Functions
GeoGebra
New Resources
拼砌四邊形
找出對稱軸
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
兩位數除以一位數（一）
Discover Resources
橢圓軌跡
橢圓拋物面2
二次函數圖形測驗2
折線運動1
圆锥曲线1
Discover Topics
Solids or 3D Shapes
Rotation
Cylinder
Piecewise Functions
Logarithm