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TAN() and COT() Function in SQL Server

Last Updated : 06 Oct, 2020
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1. TAN() Function : The TAN() function returns the tangent of a number. Syntax :
TAN(number)
Parameter : Required. A numeric value. number : It is a numeric value. Returns : It returns the float_expression of the tangent of a number. Example-1 : When the arguments holds a positive number.
SELECT TAN(3.25);
Output :
0.10883402551332971

Example-2 : When the arguments holds a negative number.
SELECT TAN(-3.25);
Output :
-0.10883402551332971

Example-3 : When the PI() function is the argument.
SELECT TAN(PI());
         OR
DECLARE @angle FLOAT;  
SET @angle = PI();  
SELECT 'The TAN of the angle is: ' + CONVERT(VARCHAR, TAN(@angle)); 
Output :
The TAN of the angle is: -1.22465e-016

Example-4 : When the argument passing as a expressions.
SELECT TAN(5.2 + 1.4);
Output :
0.32785800671313348

2. COT() Function : The COT() function returns the cotangent of a number. Syntax :
COT(number)
Parameter : Required. A numeric value. number : It is a numeric value. Returns : It returns the cotangent of a number. Example-1 : When the arguments holds a positive number.
SELECT COT(4);
Output :
0.86369115445061673

Example-2 : When the argument is a fractional component.
SELECT COT(2.53);
Output :
-1.4259392442208509

Example-3 : When the argument is an expression.
SELECT COT(3 + 1);
Output :
0.86369115445061673
Example-4 : When the PI() function is the argument.
Select COT(PI());
         OR
DECLARE @angle FLOAT;  
SET @angle = PI();  
SELECT 'The COT of the angle is: ' + CONVERT(VARCHAR, COT(@angle));
Output :
The COT of the angle is: -8.16562e+015

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