---
title: "ASIN (Transact-SQL) | Microsoft Docs"
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  - "ASIN_TSQL"
  - "ASIN"
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  - "TSQL"
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  - "ASIN function"
  - "sine"
  - "arcsine"
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---
# ASIN (Transact-SQL)
[!INCLUDE[tsql-appliesto-ss2008-all_md](../../includes/tsql-appliesto-ss2008-all-md.md)]

Returns the angle, in radians, whose sine is the specified **float** expression. This is also called arcsine.
  
![Topic link icon](../../database-engine/configure-windows/media/topic-link.gif "Topic link icon") [Transact-SQL Syntax Conventions](../../t-sql/language-elements/transact-sql-syntax-conventions-transact-sql.md)
  
## Syntax  
  
```sql
-- Syntax for SQL Server, Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse  
  
ASIN ( float_expression )  
```  
  
## Arguments  
*float_expression*  
Is an [expression](../../t-sql/language-elements/expressions-transact-sql.md) 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 takes a **float** expression and returns the ASIN of the specified angle.
  
```sql
/* The first value will be -1.01. This fails because the value is   
outside the range.*/  
DECLARE @angle float  
SET @angle = -1.01  
SELECT 'The ASIN of the angle is: ' + CONVERT(varchar, ASIN(@angle))  
GO  
  
-- The next value is -1.00.  
DECLARE @angle float  
SET @angle = -1.00  
SELECT 'The ASIN of the angle is: ' + CONVERT(varchar, ASIN(@angle))  
GO  
  
-- The next value is 0.1472738.  
DECLARE @angle float  
SET @angle = 0.1472738  
SELECT 'The ASIN of the angle is: ' + CONVERT(varchar, ASIN(@angle))  
GO  
```  
  
[!INCLUDE[ssResult](../../includes/ssresult-md.md)]
  
```sql
-------------------------  
.Net SqlClient Data Provider: Msg 3622, Level 16, State 1, Line 3  
A domain error occurred.  
  
---------------------------------   
The ASIN of the angle is: -1.5708                          
  
(1 row(s) affected)  
  
----------------------------------   
The ASIN of the angle is: 0.147811                         
  
(1 row(s) affected)  
```  
  
## Examples: [!INCLUDE[ssSDWfull](../../includes/sssdwfull-md.md)] and [!INCLUDE[ssPDW](../../includes/sspdw-md.md)]  
The following example returns the arcsine of 1.00.
  
```sql
SELECT ASIN(1.00) AS asinCalc;  
```  
  
The following example returns an error, because it requests the arcsine for a value outside the allowed range.
  
```sql
SELECT ASIN(1.1472738) AS asinCalc;  
```  
  
## See also
[CEILING (Transact-SQL)](../../t-sql/functions/ceiling-transact-sql.md)  
[Mathematical Functions (Transact-SQL)](../../t-sql/functions/mathematical-functions-transact-sql.md)  
[SET ARITHIGNORE (Transact-SQL)](../../t-sql/statements/set-arithignore-transact-sql.md)  
[SET ARITHABORT (Transact-SQL)](../../t-sql/statements/set-arithabort-transact-sql.md)