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
<?php echo(tan(0) . "<br>"); echo(tan(1) . "<br>"); ?>
Output
0<br>1.5574077246549<br>
Example
Let us see another example −
<?php echo(tan(M_PI_4)); ?>
Output
1
Example
Let us see another example −
<?php echo(tan(0.50) . "<br>"); echo(tan(-0.50)); ?>
Output
0.54630248984379<br>-0.54630248984379
Example
Let us see another example −
<?php echo(tan(-5) . "<br>"); echo(tan(-10)); ?>
Output
3.3805150062466<br>-0.64836082745909