sin

(PHP 4, PHP 5)

sin — 正弦

float sin ( float $arg )

sin() 返回参数 arg 的正弦值。参数 arg 的单位为弧度。

Example #1 sin()


<?php

// 返回值的精度由 &php.ini; 中的 precision 指示确定
echo sin(deg2rad(60));  //  0.866025403 ...
echo sin(60);           // -0.304810621 ...

?>

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sinh

Last updated: Fri, 13 Nov 2009