radians-transact-sql.md

title	RADIANS (Transact-SQL) | Microsoft Docs
ms.custom
ms.date	03/13/2017
ms.prod	sql
ms.prod_service	database-engine, sql-database, sql-data-warehouse, pdw
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ms.technology	t-sql
ms.topic	language-reference
f1_keywords	RADIANS RADIANS_TSQL
dev_langs	TSQL
helpviewer_keywords	RADIANS function
ms.assetid	e9f69951-ecda-45d9-8909-dcb716b1b1c0
author	MikeRayMSFT
ms.author	mikeray
monikerRange	>=aps-pdw-2016||=azuresqldb-current||=azure-sqldw-latest||>=sql-server-2016||=sqlallproducts-allversions||>=sql-server-linux-2017||=azuresqldb-mi-current

RADIANS (Transact-SQL)

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

Returns radians when a numeric expression, in degrees, is entered.

Transact-SQL Syntax Conventions

Syntax

RADIANS ( numeric_expression )  

Arguments

numeric_expression
Is an expression of the exact numeric or approximate numeric data type category, except for the bit data type.

Return Types

Returns the same type as numeric_expression.

Examples

A. Using RADIANS to show 0.0

The following example returns a result of 0.0 because the numeric expression to convert to radians is too small for the RADIANS function.

SELECT RADIANS(1e-307)  
GO  

[!INCLUDEssResult]

-------------------   
0.0                        
(1 row(s) affected)  

B. Using RADIANS to return the equivalent angle of a float expression.

The following example takes a float expression and returns the RADIANS of the specified angle.

-- First value is -45.01.  
DECLARE @angle float  
SET @angle = -45.01  
SELECT 'The RADIANS of the angle is: ' +  
   CONVERT(varchar, RADIANS(@angle))  
GO  
-- Next value is -181.01.  
DECLARE @angle float  
SET @angle = -181.01  
SELECT 'The RADIANS of the angle is: ' +  
   CONVERT(varchar, RADIANS(@angle))  
GO  
-- Next value is 0.00.  
DECLARE @angle float  
SET @angle = 0.00  
SELECT 'The RADIANS of the angle is: ' +  
   CONVERT(varchar, RADIANS(@angle))  
GO  
-- Next value is 0.1472738.  
DECLARE @angle float  
SET @angle = 0.1472738  
SELECT 'The RADIANS of the angle is: ' +  
    CONVERT(varchar, RADIANS(@angle))  
GO  
-- Last value is 197.1099392.  
DECLARE @angle float  
SET @angle = 197.1099392  
SELECT 'The RADIANS of the angle is: ' +  
   CONVERT(varchar, RADIANS(@angle))  
GO  

[!INCLUDEssResult]

---------------------------------------   
The RADIANS of the angle is: -0.785573                        
(1 row(s) affected)  
---------------------------------------   
The RADIANS of the angle is: -3.15922                         
(1 row(s) affected)  
---------------------------------------   
The RADIANS of the angle is: 0                                
(1 row(s) affected)  
---------------------------------------   
The RADIANS of the angle is: 0.00257041                       
 (1 row(s) affected)  
---------------------------------------   
The RADIANS of the angle is: 3.44022                          
(1 row(s) affected)  

See Also

CAST and CONVERT (Transact-SQL)
decimal and numeric (Transact-SQL)
float and real (Transact-SQL)
int, bigint, smallint, and tinyint (Transact-SQL)
Mathematical Functions (Transact-SQL)
money and smallmoney (Transact-SQL)