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Returns the angle in radians whose tangent is a specified float expression. This is also called arctangent.
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Transact-SQL Syntax Conventions
Syntax
ATAN ( float_expression )
Arguments
- float_expression
Is an expression of the type float or of a type that can be implicitly converted to float.
Return Types
float
Examples
The following example takes a float expression and returns the ATAN of the specified angle.
SELECT 'The ATAN of -45.01 is: ' + CONVERT(varchar, ATAN(-45.01))
SELECT 'The ATAN of -181.01 is: ' + CONVERT(varchar, ATAN(-181.01))
SELECT 'The ATAN of 0 is: ' + CONVERT(varchar, ATAN(0))
SELECT 'The ATAN of 0.1472738 is: ' + CONVERT(varchar, ATAN(0.1472738))
SELECT 'The ATAN of 197.1099392 is: ' + CONVERT(varchar, ATAN(197.1099392))
GO
Here is the result set.
-------------------------------
The ATAN of -45.01 is: -1.54858
(1 row(s) affected)
--------------------------------
The ATAN of -181.01 is: -1.56527
(1 row(s) affected)
--------------------------------
The ATAN of 0 is: 0
(1 row(s) affected)
----------------------------------
The ATAN of 0.1472738 is: 0.146223
(1 row(s) affected)
-----------------------------------
The ATAN of 197.1099392 is: 1.56572
(1 row(s) affected)
See Also
Reference
CEILING (Transact-SQL)
Mathematical Functions (Transact-SQL)