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三角関数（正弦、余弦）
Author:
yukumura yasunori
Topic:
Trigonometric Functions
GeoGebra
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standingwave
アステロイド
standingwave-plus
小テスト
standingwave-reflection-free
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二進法⇔十進法 binary system
表で一次関数を考える
反転法の原理
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max and min of y(x^2+xy+y^2-1) on 4x^2+4xy+3y^2<=1
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Step Functions
Square
Subtraction
Vectors
Tangent Function