COSH

描述

返回 x 的双曲余弦。

语法

COSH(<x>)

参数

参数	说明
<x>	需要被计算双曲余弦的值

返回值

参数 x 的双曲余弦值

特殊情况

• 当 x 为 NaN，返回 NaN
• 当 x 为正无穷，返回 Infinity
• 当 x 为负无穷，返回 Infinity
• 当 x 为 NULL，返回 NULL

示例

select cosh(0);

+-------------------------+
| cosh(cast(0 as DOUBLE)) |
+-------------------------+
|                     1.0 |
+-------------------------+

select cosh(1);

+-------------------------+
| cosh(cast(1 as DOUBLE)) |
+-------------------------+
|       1.543080634815244 |
+-------------------------+

select cosh(-1);

+--------------------------+
| cosh(cast(-1 as DOUBLE)) |
+--------------------------+
|        1.543080634815244 |
+--------------------------+

select cosh(cast('nan' as double));

+-----------------------------+
| cosh(cast('nan' AS DOUBLE)) |
+-----------------------------+
| NaN                         |
+-----------------------------+

select cosh(cast('inf' as double));

+-----------------------------+
| cosh(cast('inf' AS DOUBLE)) |
+-----------------------------+
| Infinity                    |
+-----------------------------+

select cosh(cast('-inf' as double));

+------------------------------+
| cosh(cast('-inf' AS DOUBLE)) |
+------------------------------+
| Infinity                     |
+------------------------------+