In MariaDB, COT() is a built-in numeric function that returns the cotangent of its argument.

In trigonometry, in a right triangle, the cotangent of an angle is the length of the adjacent side divided by the length of the opposite side.

Syntax

The syntax goes like this:

COT(X)

Where X is the number for which to get the cotangent.

Example

Here’s an example:

SELECT COT(45);

Result:

+--------------------+
| COT(45)            |
+--------------------+
| 0.6173696237835551 |
+--------------------+

Fractions

The argument can contain a fractional part:

SELECT COT(4.57);

Result:

+---------------------+
| COT(4.57)           |
+---------------------+
| 0.14335914325793922 |
+---------------------+

Negative Values

The argument can be negative:

SELECT COT(-4.57);

Result:

+----------------------+
| COT(-4.57)           |
+----------------------+
| -0.14335914325793922 |
+----------------------+

Expressions

The argument can include expressions like this:

SELECT COT(0.4 * 1.3);

Result:

+--------------------+
| COT(0.4 * 1.3)     |
+--------------------+
| 1.7465362641453968 |
+--------------------+

Zero Arguments

The argument must be non-zero, as the cotangent of zero doesn’t exist.

SELECT COT(0);

Result:

ERROR 1690 (22003): DOUBLE value is out of range in 'cot(0)'

Non-Numeric Arguments

Here’s an example of what happens when we provide a non-numeric argument:

SELECT COT('Cat');

Result:

ERROR 1690 (22003): DOUBLE value is out of range in 'cot('Cat')'

Null Arguments

COT() returns null if the argument is null:

SELECT COT(null);

Result:

+-----------+
| COT(null) |
+-----------+
|      NULL |
+-----------+

Missing Arguments

Calling COT() with the wrong number of arguments, or without any arguments results in an error:

SELECT COT();

Result:

ERROR 1582 (42000): Incorrect parameter count in the call to native function 'COT'

And:

SELECT COT(10, 2);

Result:

ERROR 1582 (42000): Incorrect parameter count in the call to native function 'COT'