ACOS (Transact-SQL)

 

THIS TOPIC APPLIES TO: yesSQL Server (starting with 2008)yesAzure SQL DatabaseyesAzure SQL Data Warehouse yesParallel Data Warehouse

A mathematical function that returns the angle, in radians, whose cosine is the specified float expression; also called arccosine.

Topic link icon Transact-SQL Syntax Conventions

-- Syntax for SQL Server, Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse  
  
ACOS ( float_expression )  

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.

float

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)  

The following example returns the ACOS of the specified number.

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)  

Mathematical Functions (Transact-SQL)
Built-in Functions (Transact-SQL)

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