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sin四分之三兀是多少
更新时间: 2020-10-27 00:00:00  

Sin4分之3π=sin(π-π/4)=sin(π/4)=√2/2=2分之根号2。

sin是数学术语,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,sin是由英语sine一词简写得来,即sinA=∠A的对边/斜边。古代说法,正弦是股与弦的比例。

关键词: sin 分之 多少

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