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PHP
数学 | Mathematics

sin

sin

(PHP 4, PHP 5, PHP 7)

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() - Arc sine

  • sinh() - Hyperbolic sine

  • cos() - Cosine

  • tan() - Tangent

  • deg2rad() - Converts the number in degrees to the radian equivalent

← round

sinh →

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https://secure.php.net/manual/en/function.sin.php