cos

(PHP 4, PHP 5, PHP 7)

cos — 锟斤拷锟斤拷

说锟斤拷

cos ( float $arg ) : float

cos() 锟斤拷锟截诧拷锟斤拷 arg 锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷 arg 锟侥碉拷位为锟斤拷锟饺★拷

锟斤拷锟斤拷

arg

锟皆伙拷锟饺憋拷示锟侥角讹拷

锟斤拷锟斤拷值

arg锟斤拷锟斤拷锟斤拷值

锟斤拷锟斤拷

Example #1 cos() 锟斤拷锟斤拷

<?php

echo cos(M_PI); // -1

?>

锟轿硷拷

  • acos() - 锟斤拷锟斤拷锟斤拷
  • sin() - 锟斤拷锟斤拷
  • tan() - 锟斤拷锟斤拷
  • deg2rad() - 锟斤拷锟角讹拷转锟斤拷为锟斤拷锟斤拷