**SQL TAN()** is a built-in function that is used for finding the tangent of the specified angle(in radians) in the defined float expression. The mathematical formula for this **function** is **TAN**(x) = Length of the Opposite Side / Length of the Adjacent Side.

**SQL TAN()** function returns the tangent of a number.

**SQL** **TAN() **method calculates the **Tangent** value for the given angle.

**Syntax**

SELECT TAN (float_expression);

**Parameters**

Float_expression: An expression of float or any other type which is implicitly converted to float whose tangent value is to be retrieved.

**Examples**

**Query 1**

SELECT TAN (1);

**Output**

1.5574077246549

**Explanation**

Here, the tangent value is returned.

**Query 2**

SELECT TAN (3);

**Output**

-0.142546543074278

**Explanation**

Here, the tangent value is returned.

**Query 3**

SELECT TAN (1.3);

**Output**

3.6021024479679786

**Explanation**

Here, the tangent value is returned.

**Query 4**

SELECT TAN (2.5 + 0.3);

**Output**

-0.35552983165117608

**Explanation**

Here, the cotangent value of the arithmetic expression is returned.

**Query 5**

SELECT PI () 'PI', TAN (PI ()) 'Tangent of PI';

**Output**

PI | Tangent of PI |

3.14159265358979 | -1.22464679914735E-16 |

**Explanation**

In this PI function was passed as an argument to the TAN function.

**Conclusion**

The SQL TAN() method calculates the tangent of an input argument.

In math, given the ABC triangle, the tan(A) is defined as the ratio between the side opposite to the A (a) and the side adjacent to the A (b) as follows.

**tan A = a / b**

For the inverse of a TAN() function, see the ATAN() function.

That’s it.