IMO, it is a plain bug in MySQL 5.5+ then. At least a documentation bug, but I believe more than that.
-- Peter On Thu, Aug 1, 2013 at 10:35 PM, Roberto Spadim <[email protected]>wrote: > from mysql 5.1, 5.5, 5.6, 5.7 manual > > http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html#function_cot > > http://dev.mysql.com/doc/refman/5.5/en/mathematical-functions.html#function_cot > > http://dev.mysql.com/doc/refman/5.6/en/mathematical-functions.html#function_cot > > http://dev.mysql.com/doc/refman/5.7/en/mathematical-functions.html#function_cot > * > * > > - > > > COT(*X*)<http://dev.mysql.com/doc/refman/5.1/en/mathematical-functions.html#function_cot> > > Returns the cotangent of *X*. > > mysql> *SELECT COT(12);* > -> -1.5726734063977 > mysql> *SELECT COT(0);* > -> NULL > > > > maybe a sql_mode parameter change the output of this function? > >
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