ACOS (Transact-SQL)
A mathematical function that returns the angle, in radians, whose cosine is the specified float expression; also called arccosine.
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Transact-SQL Syntax Conventions
Syntax
ACOS ( float_expression )
Arguments
- float_expression
Is an expression of the type float or of a type that can be implicitly converted to float, with a value from -1 through 1. Values outside this range return NULL and report a domain error.
Return Types
float
Examples
The following example returns the ACOS of the specified number.
SET NOCOUNT OFF;
DECLARE @cos float;
SET @cos = -1.0;
SELECT 'The ACOS of the number is: ' + CONVERT(varchar, ACOS(@cos));
Here is the result set.
---------------------------------
The ACOS of the number is: 3.14159
(1 row(s) affected)