Updated capitalization

Keywords from lowercase to uppercase

Author: icoric

docs/t-sql/functions/cot-transact-sql.md

@@ -44,9 +44,9 @@ An [expression](../../t-sql/language-elements/expressions-transact-sql.md) of ty
 This example returns the `COT` value for the specific angle:
 
 ```sql
-DECLARE @angle float;  
+DECLARE @angle FLOAT;  
 SET @angle = 124.1332;  
-SELECT 'The COT of the angle is: ' + CONVERT(varchar,COT(@angle));  
+SELECT 'The COT of the angle is: ' + CONVERT(VARCHAR, COT(@angle));  
 GO  
 ```