PHP tan() Function

Example

Return the tangent of different numbers:

<?php
echo(tan(M_PI_4) . " ");
echo(tan(0.50) . " ");
echo(tan(-0.50) . " ");
echo(tan(5) . " ");
echo(tan(10) . " ");
echo(tan(-5) . " ");
echo(tan(-10));
?>

Try it Yourself »

Definition and Usage

The tan() function returns the tangent of a number.

Syntax

tan(number);

Parameter Values

Parameter	Description
number	Required. Specifies a value in radians

Technical Details

Return Value:	The tangent of number
Return Type:	Float
PHP Version:	4+

❮ PHP Math Reference