SQL Server COS() Function
The COS() function in SQL Server calculates the cosine of an angle. The input angle must be provided in radians.
COS(): Definition and Usage
The cosine function (cos) is a fundamental trigonometric function used extensively in mathematics, science, and engineering. In SQL Server, the COS() function allows you to easily incorporate cosine calculations into your queries. The input to the function is an angle expressed in radians, and the output is the cosine of that angle, which will be a value between -1 and 1.
Syntax
Syntax
COS(number)
Parameter Values
| Parameter | Description |
|---|---|
number |
The angle in radians for which you want to calculate the cosine. This is required and must be a numeric value. |
Examples
Calculating the Cosine of a Number
This example calculates the cosine of 2 radians.
Syntax
SELECT COS(2);
Output
-0.416146836547142
Calculating the Cosine of Pi
This example calculates the cosine of π (pi) radians which is -1.
Syntax
SELECT COS(PI());
Output
-1.00000000000000