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三角関数（正弦、余弦）

Author:元木　啓史

Topic:Trigonometric Functions

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正１７角形　作図　regular 17-gon
standingwave-reflection-fixed
standingwave-reflection
目で見る立方体の2等分
コイン投げと樹形図

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４次方程式の根の図
ねじ　と　でんきゅう
cubic billiard hole
２例題21　解の配置
２つの正三角形の問題

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Rectangle
Scalene Triangles
Means
Numbers
Step Functions

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