# sin

(PHP 4, PHP 5, PHP 7)

sin — Sine

### Description

sin ( float `$arg` ) : float

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() - Arc sine
- sinh() - Hyperbolic sine
- cos() - Cosine
- tan() - Tangent
- deg2rad() - Converts the number in degrees to the radian equivalent