檢視余割函数的原始碼

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中文名；余割函数

外文名；cosecant

记为；y=cscx

定义域；{x|x≠kπ，k∈Z}

值域；{y|y≥1或y≤-1}
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余割为一个角的顶点和该角终边上另一个任意点之间的距离除以该任意点的非零纵[[坐标]]所得之商，这个角的顶点与平面直角坐标系的原点重合，而其始边则与正X轴重合。

在直角[[三角形]]中，斜边与某个锐角的对边的比值叫做该锐角的[[余割]].记作cscx。

余割与正弦的比值表达式互为倒数。

'''余割函数'''为奇函数，且为周期[[函数]]。

余割函数记为：y=cscx。<ref>[https://wenku.so.com/d/2457bcd84a95beba41891d693c2c242c 余割函数],360文库 , 2021年2月1日</ref>