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# sin

(PHP 3, PHP 4 )

sin -- Sine

## Description

float sin ( float arg)

sin() returns the sine of the `arg` parameter. The `arg` parameter is in radians.

    <?php

    // Precision depends on your precision directive
    print sin(deg2rad(60));  //  0.866025403 ...
    print sin(60);           // -0.304810621 ...

    ?>

See also asin(), cos(), tan() and deg2rad().

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