September 2001
Intermediate to advanced
768 pages
32h 45m
English
Content preview from PHP Functions Essential Reference
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acos
float acos(float float) Returns the calculated arccosine of the given argument.
Returns:
Arccosine of a value
Description:
acos() calculates the arccosine of a value.
Version:
PHP 3, PHP 4
See also:
asin() atan() atan2() cos() sin() tan()
Example:
Calculate the arccosine of a value
$cos = 0.5; echo "The arccosine of $cos is ", acos($cos); |
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.