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【3】_有名角の三角比
Author:
紫紺塾
GeoGebra
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standingwave-reflection-free
円の伸開線
standingwave-plus
正１７角形 作図 regular 17-gon 2
sine-wave
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複素数列
open,close
三角錐の体積の求め方
判別式の教材最終版
２次関数の最大と最小（主係数に文字を含む場合）
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Right Triangles
Derivative
Median Value
Sine
Vectors 3D (Three-Dimensional)