解题方法
1 . 已知
都是锐角,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668b7f96888281bb83fe5c96411fc0cf.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73ea66a6e8dd4b8c71b4dbbb6aae78c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668b7f96888281bb83fe5c96411fc0cf.png)
您最近一年使用:0次
2 . 已知
,并且
是第二象限角,求:
(1)
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bc052a11cf1a01445992672dde2836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b9caabf7cac85deb44988f2bb135d1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708119f082a3e254705f3c6369a36ae.png)
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解题方法
3 . 已知
为第二象限角,
,
为第一象限角,
.
(1)求
的值.
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bc052a11cf1a01445992672dde2836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a02f2f211664e50c7250355e83aae1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b04da7eac640b5b735da7fb5da8cfd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a71788c5babc2be5da0b5a2bd000601.png)
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4 . 已知
为锐角,
,角
的终边上有一点
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bc052a11cf1a01445992672dde2836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13bf66fc845b115de4ec45b4be0e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b729f3bcad3527fd911eb71de25a64f9.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
5 . 已知
是方程
的两个实数根,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab0e25cb7c556f914e6bc15727ae556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b2fd66443224993fc354509c4a3163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2218b014360e33cdf10ea1086b000ef.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
6 . 如图,三个相同的正方形相接,则
的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/0264a615-2bd2-4256-8050-93bf1c6640f7.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc2945a3981003a33922d838e04ddf7f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/2/0264a615-2bd2-4256-8050-93bf1c6640f7.png?resizew=173)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
7 . 若
、
为锐角,
,
,则角![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca3f0a4b2d06539e74594736881aaa.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a8b16358f2ab3ba16c0de9f4c5aca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccd1dfdc167165bcad456709247c723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca3f0a4b2d06539e74594736881aaa.png)
您最近一年使用:0次
2023-03-16更新
|
409次组卷
|
4卷引用:专题08 两角和与差的三角函数-【寒假自学课】(苏教版2019)
(已下线)专题08 两角和与差的三角函数-【寒假自学课】(苏教版2019)(已下线)8.2.2 两角和与差的正弦、正切(2)-【帮课堂】(人教B版2019必修第三册)上海奉贤区致远高级中学2022-2023学年高一下学期第一次月考数学试题甘肃省金昌市永昌县第一高级中学2022-2023学年高一下学期期中数学试题
8 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae46da435e0d99634ece9aa862826e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
A.![]() | B.![]() | C.-2 | D.2 |
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2022-07-09更新
|
1369次组卷
|
6卷引用:8.2.2两家和与差的正弦、正切-同步精品课堂(人教B版2019必修第三册)
(已下线)8.2.2两家和与差的正弦、正切-同步精品课堂(人教B版2019必修第三册)四川省眉山市东坡区多悦高级中学校2023-2024学年高一下学期4月期中考试数学试题陕西省咸阳市2021-2022学年高一下学期期末数学试题(已下线)10.1 两角和与差的三角函数1-2022-2023学年高一数学《考点·题型·技巧》精讲与精练高分突破系列(苏教版2019必修第二册)四川省成都市府新区2022-2023学年高一下学期期末数学试题安徽省蚌埠市2023届高三第三次教学质量检查考试数学试题
解题方法
9 . 已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a7de5b70003502e40b95b3b7d3d933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1a5e0ef694ff81817b001cc6ecec62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663b6bb8e965eebfdfe57372380dd61d.png)
A.![]() | B.-![]() | C.-![]() | D.![]() |
您最近一年使用:0次
2022-04-29更新
|
1652次组卷
|
4卷引用:专题08 两角和与差的三角函数-【寒假自学课】(苏教版2019)
(已下线)专题08 两角和与差的三角函数-【寒假自学课】(苏教版2019)江苏省宿迁北附同文实验学校2022-2023学年高一下学期5月月考数学试题江苏省淮安市高中校协作体2021-2022学年高一下学期期中联考数学试题(已下线)第03讲 两角和与差的正弦、余弦和正切公式(讲+练)-2023年高考数学一轮复习讲练测(新教材新高考)
10 . 已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b729f3bcad3527fd911eb71de25a64f9.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536e072eb0439a5e5b430cd55a129374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579caafab6d26fb86305c93991bc4a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b729f3bcad3527fd911eb71de25a64f9.png)
您最近一年使用:0次