天气预报 > 教育 > 初中三角函数速记口诀
初中三角函数速记口诀
更新时间: 2021-02-03 20:00:18  

1、三角函数有正弦、余弦、正切、余切,可用一句口诀记住:一位不高明的厨子教徒弟杀鱼,说了这么一句话:正对鱼磷(余邻)直刀切。正:正弦或正切,对:对边即正是对;余:余弦或余弦,邻:邻边即余是邻;切是直角边。

2、三角函数的增减性:正增余减

特殊三角函数值记忆:首先记住30度、45度、60度的正弦值、余弦值的分母都是2,正切、余切的分母都是3,分子记口诀“123,321,三九二十七”既可。

关键词: 初中 三角函数 速记 口诀

初中三角函数速记口诀相关经验

天气预报

最新推荐

页面:/news/view-1016976/ | 耗时:0.2845 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=1016976 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1016976 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1016976 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1602054,3277505,1425151,1089981,3061842,726823,3444569,3097127,359616,778902,3126458,1013311,531784,451764,823206,1012593,1723852,2756457,1307134,3417762,2246111,3289169,3373052,3353916,3163589,3007664,2469838,3524718,2988136,2095079) ORDER BY field (ArticleID,1602054,3277505,1425151,1089981,3061842,726823,3444569,3097127,359616,778902,3126458,1013311,531784,451764,823206,1012593,1723852,2756457,1307134,3417762,2246111,3289169,3373052,3353916,3163589,3007664,2469838,3524718,2988136,2095079)