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PHP Quiz PHP CertificatePHP sin() Function
Complete PHP Math Reference
Definition and Usage
The sin() function returns the sine of a number.
Syntax
sin(x)
| Parameter | Description |
|---|---|
| x | Required. A number |
Tips and Notes
Note: The sin() function returns a numeric value between -1 and 1, which represents the sine of the parameter x.
Example
In the following example we will return the sine of different numbers:
<?php
echo(sin(3) . "<br />");
echo(sin(-3) . "<br />");
echo(sin(0) . "<br />");
echo(sin(M_PI) . "<br />");
echo(sin(M_PI_2))
?>
echo(sin(3) . "<br />");
echo(sin(-3) . "<br />");
echo(sin(0) . "<br />");
echo(sin(M_PI) . "<br />");
echo(sin(M_PI_2))
?>
The output of the code above will be:
0.14112000806
-0.14112000806
0
1.22460635382E-016
1
-0.14112000806
0
1.22460635382E-016
1
Complete PHP Math Reference
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