SQL Server RADIANS() Function
The RADIANS() function in SQL Server converts an angle measured in degrees to its equivalent in radians. This is a fundamental trigonometric function, essential for many mathematical and scientific calculations.
RADIANS(): Definition and Usage
Radians and degrees are two different units for measuring angles. Radians are based on the radius of a circle, while degrees divide a circle into 360 parts. The RADIANS() function is necessary when you need to work with angles in radians, which is often required by trigonometric functions like SIN(), COS(), and TAN() that expect angles in radians as input.
Syntax
Syntax
RADIANS(number)
Parameter Values
| Parameter | Description |
|---|---|
number |
The angle measured in degrees. This is required and must be a numeric value. |
Examples
Converting Degrees to Radians
This example converts 180 degrees to radians.
Syntax
SELECT RADIANS(180);
Output
3.14159265358979
Converting Negative Degrees to Radians
Converting -45 degrees to radians.
Syntax
SELECT RADIANS(-45);
Output
-0.785398163397448