tan() function in PHP

The tan() function returns the tangent of the specified value.

Syntax

tan(val)

Parameters

• val − A value in radians

Return

The tan() function returns the tangent of the specified value val.

Example

 Live Demo

<?php
   echo(tan(0) . "<br>");
   echo(tan(1) . "<br>");
?>

Output

0<br>1.5574077246549<br>

Example

Let us see another example −

 Live Demo

<?php
   echo(tan(M_PI_4));
?>

Output

1

Example

Let us see another example −

 Live Demo

<?php
   echo(tan(0.50) . "<br>");
   echo(tan(-0.50));
?>

Output

0.54630248984379<br>-0.54630248984379

Example

Let us see another example −

 Live Demo

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

Output

3.3805150062466<br>-0.64836082745909