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二倍角的正弦公式的证明
Author:
桃篮翁
GeoGebra
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斐波那契螺旋弧线(表格法-可动态调节)
平行線的判定
中华人民共和国国旗
龙形曲线-分形龙
椭圆内切圆链
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第12届美国中学生数学邀请赛题
Quiz on Rectangular Coordinates (2) 直角坐標測驗2
if指令
angle at the same segment
直角坐標與極坐標的轉換
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Cuboid
Binomial Distribution
Circumcircle or Circumscribed Circle
Tangent Function
Real Numbers