# acos

### Description

Returns the angle (in radians) whose cosine is specified.

### Syntax

acos(*cosine*)

### Parameters

*cosine*
is the cosine of the angle, expressed as a column
name, variable, or constant of type *float*, *real*, *double
precision*, or any datatype that can be implicitly converted
to one of these types.

### Examples

*Example 1*

Returns the angle whose cosine is 0.52:

select acos(0.52)

--------------------
1.023945

### Usage

**acos**,
a mathematical function, returns the angle (in radians) whose cosine is
the specified value.

For general information about mathematical functions,
see “Mathematical functions”.

### Standards

**SQL92** – Compliance level: Transact-SQL
extension.

### Permissions

Any user can execute **acos**.

### See also

**Functions** cos, degrees, radians