解题方法
1 . 已知等腰三角形一个底角的正弦值为
,求这个三角形的顶角的正弦、余弦及正切的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
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解题方法
2 . 已知
,
,求
,
和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7935c2b090920256d2c01b2645d3867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a628e50eae992e6f7603074ef09be1b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f04c7c99a24980dc13b64b2523bf15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e387687ef705d7b6694aedde85a2e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24065d444e68ede7fe10b02e92b70d7d.png)
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3 . 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1025c09a3b71630c2a3fd665be85a8c.png)
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4 . 求证:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa937ccb146dae977cb55510f4d5042.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8647d21551f167d68b305179c37ed.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c58a6ee2ea78be2d62f5c182c04326.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15c3e2158bdc118bb5ef2c9c16b5eb5.png)
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解题方法
5 . 已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b98a645d4f3e06cb5f1ff75e1c24234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b7a83ac01f453be15d2d23d4f79024.png)
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解题方法
6 . 已知
,
,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/442371d587212be20c73304db863d006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65934742c835a80606e82638d7bcde9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146fc0a63e5c14a8fa46573e60c07ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
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2023-10-09更新
|
169次组卷
|
4卷引用:北师大版(2019)必修第二册课本习题第四章3.1二倍角公式
北师大版(2019)必修第二册课本习题第四章3.1二倍角公式(已下线)5.5.1 两角和与差的正弦、余弦、正切公式精练-【题型分类归纳】(人教A版2019必修第一册)(已下线)3.1 二倍角公式北师大版(2019)必修第二册课本例题3.1 二倍角公式
7 . 求下列各式的值:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552dd0ec0fd08f1dd641e6f98f7389bc.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30653b7d13b9e1fa8e3dd31c2e8327b8.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c43126323d8d24aa043955022c3df2.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96698f290fe0782ea683947e3e7bc05f.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8aa555968a6498108e1f4509ab7956e.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c250fe1c224bec6e60c071d89fe7ee85.png)
您最近一年使用:0次
2023-10-09更新
|
160次组卷
|
3卷引用:北师大版(2019)必修第二册课本习题第四章3.1二倍角公式
解题方法
8 . 求下列各式的值:
(1)
;
(2)
;
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb61e2998645ba1d7ff92800b4acf23.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff84e7f8e716bb55f989d14ae6b174.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8621052698241d097135027a002ea4.png)
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9 . 当
时,求证:
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2331b616e0ccfb9ce96e52c4ad50ea53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0132f586547d8a9c9928091f92d0544d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b982e9a3ee26fe2a3d0671cf0e07917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8357fe57246a20aa36d9a43119add9a.png)
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10 . 已知
,
,求
,
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a892dbcef7934d97016bb190d94e0bc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d394016b9fecac73f38cbc4ff18dee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146fc0a63e5c14a8fa46573e60c07ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850dba25bf0f5f13541bf9b6ec12b84d.png)
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2023-10-04更新
|
137次组卷
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3卷引用:湘教版(2019)必修第二册课本例题2.2二倍角的三角函数
湘教版(2019)必修第二册课本例题2.2二倍角的三角函数(已下线)第09讲 5.5.1.2 二倍角的正弦、余弦、正切公式-【帮课堂】广东省珠海市北京师范大学(珠海)附属高级中学2023-2024学年高一下学期第一次月考数学试卷