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9.1 - 直角座標上的三角比
Author:
W.L. Wong, Albert
GeoGebra
New Resources
四邊形的特性
拼砌四邊形
兩位數加法
三位數除以一位數（一）
算柱 (兩位數)
Discover Resources
餘弦函數y=cos(x)的泰勒級數
The Beautiful Dance of the Earth and Venus
GGB2
v中點座標軌跡(圓大正多邊形小)
劉徽的「割圓術」的副本
Discover Topics
Planes
Set Theory
Logic
Exponent
Trigonometric Functions