ASIN()

A function that returns the angle, in radians, whose sine is the specified float expression. This is also called arcsine.

Signature

ASIN ( float_expression )

Parameters

  • float_expression — An expression of either type float or of a type that can implicitly convert to float. Only a value ranging from -1.00 to 1.00 is valid. For values outside this range, no value is returned, and ASIN will report a domain error.

Examples

SELECT ASIN(1.00) AS asinCalc;
1.5707963267948966

Run against SQL Server 16.0.4265.3 on 2026-09-13. This is the output we got, not the documentation’s.

Available on

  • SQL Server 2017 and later
  • Azure SQL Database
  • Azure SQL Managed Instance
  • Azure Synapse Analytics
  • Analytics Platform System (PDW)
  • Microsoft Fabric warehouse
  • Fabric SQL database

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Signature and description adapted from the Microsoft SQL documentation, used under the CC BY 4.0. SQL Server and Azure are trademarks of the Microsoft group of companies. This page is not affiliated with Microsoft.