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title: "COS (Transact-SQL) | Microsoft Docs" ms.custom: "" ms.date: "07/24/2017" ms.prod: sql ms.prod_service: "database-engine, sql-database, sql-data-warehouse, pdw" ms.reviewer: "" ms.suite: "sql" ms.technology: t-sql ms.tgt_pltfrm: "" ms.topic: "language-reference" f1_keywords:

  • "COS"
  • "COS_TSQL" dev_langs:
  • "TSQL" helpviewer_keywords:
  • "cosine"
  • "COS function" ms.assetid: c9fa8ae1-3373-4f3e-9b97-fa05077c1040 caps.latest.revision: 21 author: MashaMSFT ms.author: mathoma manager: craigg monikerRange: ">=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-server-2016||=sqlallproducts-allversions||>=sql-server-linux-2017"

COS (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2008-all-md]

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

Topic link icon Transact-SQL Syntax Conventions

Syntax

COS ( float_expression )

Arguments

float_expression
An expression of type float.

Return types

float

Examples

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));  
GO

[!INCLUDEssResult]

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

[!INCLUDEssSDWfull] and [!INCLUDEssPDW]

This example returns the COS values of the specified angles:

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

[!INCLUDEssResult]

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

See also

Mathematical Functions (Transact-SQL)