# sin

(PHP 4, PHP 5)

sin — Sine

### Description

float sin ( float `$arg` )

sin() returns the sine of the `arg` parameter. The `arg` parameter is in radians.

### Parameters

`arg`

  A value in radians

### Return Values

The sine of `arg`

### Examples

Example#1 sin() example

`<?php
// Precision depends on your precision directive
echo sin(deg2rad(60)); // 0.866025403 ...
echo sin(60); // -0.304810621 ...
?>`

### See Also

- asin()
- sinh()
- cos()
- tan()
- deg2rad()