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PHP Quiz PHP CertificatePHP tan() Function
Complete PHP Math Reference
Definition and Usage
The tan() function returns a number that represents the tangent of an angle.
Syntax
tan(x)
| Parameter | Description |
|---|---|
| x | Required. A number |
Example
In this example we will get the tangent of different numbers:
<?php
echo(tan(M_PI_4) . "<br />");
echo(tan(0.50) . "<br />");
echo(tan(-0.50) . "<br />");
echo(tan(5) . "<br />");
echo(tan(10) . "<br />");
echo(tan(-5) . "<br />");
echo(tan(-10))
?>
echo(tan(M_PI_4) . "<br />");
echo(tan(0.50) . "<br />");
echo(tan(-0.50) . "<br />");
echo(tan(5) . "<br />");
echo(tan(10) . "<br />");
echo(tan(-5) . "<br />");
echo(tan(-10))
?>
The output of the code above will be:
1
0.546302489844
-0.546302489844
-3.38051500625
0.648360827459
3.38051500625
-0.648360827459
0.546302489844
-0.546302489844
-3.38051500625
0.648360827459
3.38051500625
-0.648360827459
Complete PHP Math Reference
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