PHP: tan() function

Description

The tan() function returns the tangent of a number.

Version:

(PHP 4 and above)

Syntax:

tan(num)

Parameter:

Return value:

The tangent of num.

Value Type: Float

Pictorial Presentation

Example:

<?php
$val1= 0;
$val2=4;
$val3=-4;
$val4= M_PI_4;
$ztan1=tan($val1);
$ztan2=tan($val2);
$ztan3=tan($val3);
$ztan4=cos($val4);
echo "Tangent of $val1 is $ztan1<br />";
echo "Tangent of $val2 is $ztan2<br />";
echo "Tangent of $val3 is $ztan3<br />";
echo "Tangent of $val4 is $ztan4<br />";
?>

Output:

Tangent of 0 is 0
Tangent of 4 is 1.1578212823496
Tangent of -4 is   -1.1578212823496
Tangent of  M_PI_4 is 

View the example in the browser

See also

PHP Function Reference

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