TAN()

Returns the tangent of the input expression.

Signature

TAN ( float_expression )

Parameters

  • float_expression — Is an expression of type float or of a type that can be implicitly converted to float, interpreted as number of radians.

Examples

SELECT TAN(PI()/2);
1.633123935319537E+16
SELECT TAN(.45);
0.48305506561657841

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

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.