PHP Functions Essential Reference

tan

float tan(float value) 

Provides the tangent for the given radians.

Returns:

Tangent of a value in radians

Description:

Returns the tangent of a value in radians.

Version:

PHP 3, PHP 4

See also:

acos() 
asin() 
atan() 
atan2() 
cos() 
sin() 

Example:

Calculate the tangent of a value

$rads = 2 * (pi() / 3); // a 120 degree arc $rtan = tan($trad); echo "The tangent of $rads is $rtan\n";