ACOS (Transact-SQL)

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

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)

See Also

Reference

Mathematical Functions (Transact-SQL)

Built-in Functions (Transact-SQL)