cos等于1的角度是多少度

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select * from tbl_Articles WHERE ArticleID=1677367 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1677367 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1677367 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1061282,1131479,1060391,1066090,988570,1065083,1046963,995175,1048110,1061896,1275296,1093264,1065221,1110870,1053230,1049836,1065449,1058463,1100667,1114608,1065023,1124416,1067027,1113790,1065573,1066132,1057028,1052529,1097815,1067327) ORDER BY field (ArticleID,1061282,1131479,1060391,1066090,988570,1065083,1046963,995175,1048110,1061896,1275296,1093264,1065221,1110870,1053230,1049836,1065449,1058463,1100667,1114608,1065023,1124416,1067027,1113790,1065573,1066132,1057028,1052529,1097815,1067327)