RADIANS (Transact-SQL)

RADIANS (Transact-SQL)

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

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
```

Here is the result set.

```---------------------------------------
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)
```

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