天气预报 > 其他 > 数学上cos30度是多少
数学上cos30度是多少
更新时间: 2020-10-11 00:00:00  

COS30度等于二分之根号三。

这个是属于三角函数问题,最早在初三的课本上提出,SIN是正弦,对于直角三角形来说,定义就是该角所对的边和直角三角形的斜边相比,于是SIN30度等于二分之一。

COS是余弦,定义是该角的邻边和直角三角形的斜边相比,所以COS60度等于二分之一,而TAN是正切,定义是该角的对边和该角的邻边相比,比如TAN45度等于1。

关键词: 数学 cos30 多少

数学上cos30度是多少相关经验

天气预报

最新推荐

页面:/news/view-2335872/ | 耗时:0.4462 s | 内存:2.11 MB | 查询:4 | 缓存读取:3 写入:0 | 加载文件:25
select * from tbl_Articles WHERE ArticleID=2335872 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2335872 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2335872 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1062346,1067617,1078102,1072703,1069505,1090561,1123176,1057064,1073076,1082239,1091621,1086376,1045001,1086480,1063867,1052952,1074276,1078438,1073526,1041283,1081422,1079890,1045342,1086464,1057840,1057696,1064323,1045659,1065727,1078428) ORDER BY field (ArticleID,1062346,1067617,1078102,1072703,1069505,1090561,1123176,1057064,1073076,1082239,1091621,1086376,1045001,1086480,1063867,1052952,1074276,1078438,1073526,1041283,1081422,1079890,1045342,1086464,1057840,1057696,1064323,1045659,1065727,1078428)