yiguolei commented on code in PR #2604:
URL: https://github.com/apache/doris-website/pull/2604#discussion_r2224089766
##########
docs/sql-manual/sql-functions/scalar-functions/numeric-functions/cot.md:
##########
@@ -0,0 +1,40 @@
+---
+{
+ "title": "COT",
+ "language": "en"
+}
+---
+
+## Description
+
+Returns the cotangent of x, where x is the value in radians, only input and
output are supported as double.
+
+## Syntax
+
+```sql
+COT(<x>)
+```
+
+## Parameters
+
+| Parameter | Description |
+| -- | -- |
+| `<x>` | The value for which the cotangent is to be calculated |
Review Comment:
我们得每个函数都得说清楚，因为不是所有的函数输入null，就返回null
同时，得在example 中，加一个这个例子。另外example，不要只贴sql和返回结果的截屏，要有一些解释。
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