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数学 | Mathematics

tan

tan

(PHP 4, PHP 5, PHP 7)

tan — Tangent

Description

float tan ( float $arg )

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

← srand

tanh →

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https://secure.php.net/manual/en/function.tan.php