名词
中文翻译：Unknown
同义词：
['cosine', 'cosine', 'cosine']
例句：
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1. 余弦
cosine
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2.余切
cosine
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3. 余割
cosine
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1. The angle between two lines is the cosine of the angle between them.
两线之间的夹角是它们之间角度的余弦。
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2. The cosine of an angle is the ratio of the length of the opposite side to the length of the adjacent side.
一个角的余弦是对面边长与邻边长的比值。
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3. The cosine of a triangle is the ratio of the area of one vertex to the area of the other two vertices.
三角形的余弦是其中一个顶点的面积与另外两个顶点面积的比值。