versioned_docs/version-2.1/sql-manual/sql-functions/numeric-functions/tanh.md

---
{
    "title": "TANH",
    "language": "en"
}
---

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## tanh

### description
#### Syntax

`DOUBLE tanh(DOUBLE x)`
Returns the hyperbolic tangent of `x`, tanh(x) = sinh(x) / cosh(x).

### example

```
mysql> select tanh(0);
+---------+
| tanh(0) |
+---------+
|       0 |
+---------+

mysql> select tanh(1);
+---------------------+
| tanh(1)             |
+---------------------+
| 0.76159415595576485 |
+---------------------+
```

### keywords
	TANH