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2.12. Calculating Trigonometric Functions

2.12.4. See Also

Recipe 2.13 for how to perform trig operations in degrees, not radians; documentation on sin( ) at http://www.php.net/sin, cos( ) at http://www.php.net/cos, tan( ) at http://www.php.net/tan, asin( ) at http://www.php.net/asin, acos( ) at http://www.php.net/acos, atan( ) at http://www.php.net/atan, and atan2( ) at http://www.php.net/atan2.



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