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正弦是什么边对什么边

更新时间: 2021-04-03 09:11:22     

1、正弦是对边比斜边。

2、正弦(sine),数学术语,在直角三角形中,任意一锐角∠A的对边与斜边的比叫做∠A的正弦,记作sinA(由英语sine一词简写得来),即sinA=∠A的对边/斜边。

3、古代说法,正弦是股与弦的比例。

关键词: 正弦 什么

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