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Sec、csc、cot的三角函数公式是secx=1/ (cosx)、cscx=1/ (sinx)、cotx=1/ (tanx)= (cosx)/ (sinx)。三角函数是基本初等函数之一，是以角度为自变量，角度对应任意角终边与单位圆交点坐标. 知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业. [x]在数学中表示的是什么意思.不大于x的整数。这个是高斯函数，也叫取整函数， [x]是x的整数部分， {x}是x的小数部分。x= [x]+ {x}；例如x=1.55。 [x]=1、 {x}=0.55。扩展资料不超过实数x.
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