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三平方の定理 証明13
Author:
Bunryu Kamimura
GeoGebra
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直線の軌跡
standingwave
円の伸開線
sine-wave
対数螺旋
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第2章例題13
三角形の角の二等分線(a inner center)
逆垂足三角形=傍心三角形
三角波・矩形波・のこぎり波の振幅変調
接線 問2
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Trigonometry
Rotation
Tree Diagrams
Intersection
Secant Line or Secant