COS (Transact-SQL)

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric

A mathematical function that returns the trigonometric cosine of the specified angle - measured in radians - in the specified expression.

Transact-SQL syntax conventions


COS ( float_expression )  


To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.


An expression of type float.

Return types



This example returns the COS value of the specified angle:

  DECLARE @angle FLOAT;  
SET @angle = 14.78;  
SELECT 'The COS of the angle is: ' + CONVERT(VARCHAR,COS(@angle));  

Here is the result set.

The COS of the angle is: -0.599465                        
(1 row(s) affected)  

Azure Synapse Analytics and Analytics Platform System (PDW)

This example returns the COS values of the specified angles:

SELECT COS(14.76) AS cosCalc1, COS(-0.1472738) AS cosCalc2;   

Here is the result set.

cosCalc1  cosCalc2
--------  --------
-0.58     0.99

See also

Mathematical Functions (Transact-SQL)