名词中文翻译
中文翻译：正切
同义词：
['sine', 'tangential']
例句：
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1.The angle between the two lines is a tangent.
两条线之间的角是切线。
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2.The circle's radius is its own tangent.
圆的半径是自己的切线。
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3.The line that divides the circle into two equal parts is its diameter and its tangent.
将圆分成两个相等部分的线是直径和切线。