Math Functions
PHP Manual

tan

Tangent

Description

float tan ( float $arg )

tan returns the tangent of the arg parameter. The arg parameter is in radians.

Parameters

arg

The argument to process in radians

Return Values

The tangent of arg

Examples

Example #1 tan example

<?php

echo tan(M_PI_4); // 1

?>

See Also

  • atan
  • atan2
  • sin
  • cos
  • tanh
  • deg2rad