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tan (PHP 3, PHP 4, PHP 5) tan -- Tangent Descriptionfloat 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
?>
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See also:
atan(),
sin(),
cos(), and
deg2rad().
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