? COS Function in SQL

The COS() function returns the cosine of a given angle (in radians).

? Syntax

COS(angle_in_radians)

• angle_in_radians: The angle value in radians (not degrees).

? Example Usage

SELECT COS(0);      -- Result: 1SELECT COS(PI()/2); -- Result: close to 0SELECT COS(PI());   -- Result: -1

? Notes

• If you have an angle in degrees, convert it to radians first:

SELECT COS(RADIANS(60));  -- cosine of 60 degrees

• Available in most SQL databases like MySQL, PostgreSQL, SQL Server, Oracle.

If you want, I can show examples converting degrees to radians or usage in specific SQL dialects!