> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/sql-functions/numeric-functions/tan.md).

# TAN

## Syntax

```bnf
TAN(X)
```

## Description

Returns the tangent of X, where X is given in radians.

## Examples

```sql
SELECT TAN(0.7853981633974483);
+-------------------------+
| TAN(0.7853981633974483) |
+-------------------------+
|      0.9999999999999999 |
+-------------------------+

SELECT TAN(PI());
+-----------------------+
| TAN(PI())             |
+-----------------------+
| -1.22460635382238e-16 |
+-----------------------+

SELECT TAN(PI()+1);
+-----------------+
| TAN(PI()+1)     |
+-----------------+
| 1.5574077246549 |
+-----------------+

SELECT TAN(RADIANS(PI()));
+--------------------+
| TAN(RADIANS(PI())) |
+--------------------+
| 0.0548861508080033 |
+--------------------+
```

<sub>*This page is licensed: GPLv2, originally from*</sub> [<sub>*fill\_help\_tables.sql*</sub>](https://github.com/MariaDB/server/blob/main/scripts/fill_help_tables.sql)

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