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COT

描述

返回 x 的余切值,x 为弧度值,仅支持输入输出为double。输入null值时会返回null。

语法

COT(<x>)

参数

参数说明
<x>需要被计算余切值的值

返回值

返回一个 Double 类型的值表示 x 的余切值。

特殊情况

  • xNaN,返回 NaN
  • x 为正无穷或负无穷(±Infinity),返回 NaN
  • xNULL,返回 NULL

举例

select cot(1),cot(2),cot(1000);
+--------------------+----------------------+--------------------+
| cot(1) | cot(2) | cot(1000) |
+--------------------+----------------------+--------------------+
| 0.6420926159343306 | -0.45765755436028577 | 0.6801221323348698 |
+--------------------+----------------------+--------------------+

输入null值。

select cot(null);
+--------------------+
| cot(null) |
+--------------------+
| NULL |
+--------------------+
select cot(cast('nan' as double));
+----------------------------+
| cot(cast('nan' AS DOUBLE)) |
+----------------------------+
| NaN |
+----------------------------+
select cot(cast('inf' as double));
+----------------------------+
| cot(cast('inf' AS DOUBLE)) |
+----------------------------+
| NaN |
+----------------------------+
select cot(cast('-inf' as double));
+-----------------------------+
| cot(cast('-inf' AS DOUBLE)) |
+-----------------------------+
| NaN |
+-----------------------------+