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PHP - Manual: asin - 互联网笔记

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PHP官方手册 - 互联网笔记

PHP - Manual: asin

2025-04-27

asin

(PHP 4, PHP 5, PHP 7, PHP 8)

asin反正弦

说明

asin(float $num): float

返回 num 的反正弦值,单位是弧度。asin()sin() 的反函数,它的意思是对于 asin() 的定义域中的每个 num 值,$num == sin(asin($num))

参数

num

待处理的参数

返回值

num 的反正弦弧度。

参见

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官方地址:https://www.php.net/manual/en/function.asin.php

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