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正弦定理的验证
Author:
junfeilx
New Resources
日照与影长
幂函数的副本
三角函數出題器2.0
正弦函数自变量的几何显示
[洋蔥正方形与弦图
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全等三角形
Angle at Centre
面積
夜市麻將
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Differential Equation
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