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正弦定理
Author:
Bunryu Kamimura
a/sinA=b/sinB=c/sinC=2Rを正弦定理という。
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目で見る立方体の2等分
sine-wave
6章⑥三角柱の展開図
standingwave-reflection-fixed
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正弦函数
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Math Investigation-1
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Isosceles Triangles
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