sin()
sin() — Sine.
Built-in function of PHP 8.5. The manual lists it as available in PHP 4, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.
What it does
sin() returns the sine of the num parameter. The num parameter is in radians.
Signature
sin(float $num): float
Parameters
| Parameter | Type | What it takes |
|---|---|---|
| $num | float | A value in radians |
Return value
The sine of num
Example
A runnable snippet:
// Precision depends on your precision directive echo sin(deg2rad(60)), PHP_EOL; // 0.866025403 ... echo sin(60), PHP_EOL; // -0.304810621 ...
See also
asin(), sinh(), cos(), tan(), deg2rad()
All PHP 8.5 built-in functions
Reference card built from the PHP manual page sin() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.