COS

Description

Calculate the cosine of the parameter

Syntax

COS(<a>)

Parameters

Parameter	Description
<a>	floating point number, the radian value of the parameter to calculate

Return Value

The cosine of the parameter <a>, expressed in radians.

Special Cases

• When a is NaN, returns NaN
• When a is positive or negative infinity, returns NaN
• When a is NULL, returns NULL

Examples

select cos(1);

+---------------------+
| cos(1.0)            |
+---------------------+
| 0.54030230586813977 |
+---------------------+

select cos(0);

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

select cos(Pi());

+-----------+
| cos(pi()) |
+-----------+
|        -1 |
+-----------+

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

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

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

+----------------------------+
| cos(cast('inf' AS DOUBLE)) |
+----------------------------+
| NaN                        |
+----------------------------+

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

+-----------------------------+
| cos(cast('-inf' AS DOUBLE)) |
+-----------------------------+
| NaN                         |
+-----------------------------+