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PHP tan () function

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Examples

Returns the number of different tangent:

<?php
echo(tan(M_PI_4) . "<br>");
echo(tan(0.50) . "<br>");
echo(tan(-0.50) . "<br>");
echo(tan(5) . "<br>");
echo(tan(10) . "<br>");
echo(tan(-5) . "<br>");
echo(tan(-10));
?>

Running instance »

Definition and Usage

tan () function returns the tangent of a number.


grammar

tan( number );

参数 描述
number 必需。规定一个弧度值。

technical details

return value: number of tangent.
Return type: Float
PHP version: 4+


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