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tan

(PHP 4, PHP 5, PHP 7)

tan — Tangent

Description

tan ( float $arg ) : float

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() - Arc tangent
atan2() - Arc tangent of two variables
sin() - Sine
cos() - Cosine
tanh() - Hyperbolic tangent
deg2rad() - Converts the number in degrees to the radian equivalent

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Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.tan.php