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tanh srand

Last updated: Sat, 27 Jan 2007

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# tan

(PHP 3, PHP 4, PHP 5)

tan -- Tangent

## Description

float tan ( float arg )

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

Пример 1. tan() example

`<?php echo tan(M_PI_4); // 1 ?>`

See also: atan(), sin(), cos(), and deg2rad().

add a note User Contributed Notes
tan
fformula at gmail dot com
10-Apr-2006 05:26
`To find cotangent you can use
tan (M_PI/2 - $alfa)`
add a note
tanh srand

Last updated: Sat, 27 Jan 2007
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