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两角和的正弦公式
Author:
zhang hongwei
Topic:
Trigonometric Functions
GeoGebra
New Resources
找出對稱軸
兩組對邊相等和有直角的四邊形
畫出對稱圖形
第八周作业
算柱 (兩位數)
Discover Resources
分數除法2: p/q ÷ b（均分）
證明三角形內角和180度
台灣國旗
填色問題(封閉圖形)
微分量 (Differentials)
Discover Topics
Variance
Parallelogram
Perimeter
Derivative
Pie Chart or Circle Chart