RADIANS (Transact-SQL)

**APPLIES TO:** ![yes](media/yes.png)SQL Server (starting with 2008) ![yes](media/yes.png)Azure SQL Database ![yes](media/yes.png)Azure SQL Data Warehouse ![yes](media/yes.png)Parallel Data Warehouse

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

Topic link icon 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

Here is the result set.

-------------------   
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