---
title: "COT (Transact-SQL) | Microsoft Docs"
ms.custom: ""
ms.date: "07/24/2017"
ms.prod: sql
ms.prod_service: "database-engine, sql-database, sql-data-warehouse, pdw"
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ms.technology: t-sql
ms.topic: "language-reference"
f1_keywords: 
  - "COT_TSQL"
  - "COT"
dev_langs: 
  - "TSQL"
helpviewer_keywords: 
  - "COT function"
  - "cotangent"
ms.assetid: c87a9dac-e398-4125-80c3-7df3c2ce6b63
author: MashaMSFT
ms.author: mathoma
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---
# COT (Transact-SQL)
[!INCLUDE[tsql-appliesto-ss2008-all-md](../../includes/tsql-appliesto-ss2008-all-md.md)]

A mathematical function that returns the trigonometric cotangent of the specified angle - in radians - in the specified **float** expression.
  
![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
COT ( float_expression )  
```  
  
## Arguments  
*float_expression*  
An [expression](../../t-sql/language-elements/expressions-transact-sql.md) of type **float**, or of a type that can implicitly convert to **float**.
  
## Return types
**float**
  
## Examples  
This example returns the `COT` value for the specific angle:
  
```sql
DECLARE @angle float;  
SET @angle = 124.1332;  
SELECT 'The COT of the angle is: ' + CONVERT(varchar,COT(@angle));  
GO  
```  
  
[!INCLUDE[ssResult](../../includes/ssresult-md.md)]
  
```sql
The COT of the angle is: -0.040312                
  
(1 row(s) affected)  
```  
  
## See also
[Mathematical Functions (Transact-SQL)](../../t-sql/functions/mathematical-functions-transact-sql.md)