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単位円と正弦曲線（sin）
Author:
板木好弘
GeoGebra
New Resources
正１７角形 作図 regular 17-gon 2
standingwave-plus
二次曲線と離心率
等積変形2
対数螺旋
Discover Resources
三角関数の関係式
circular motion
球 断面
zeta function
無限等比級数の応用
Discover Topics
Secant Line or Secant
Trapezoid
Normal Distribution
Geometric Transformations
Diagrams