解题方法
1 . 已知
,
,其中
,
.
(1)求
的值;
(2)在平面向量中的学习中我们知道,若向量
,则
,类比上述结论:在空间向量中,若向量
,则
,若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc96e68b4b3cef3e24f577059617b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bf4be4dad22b4820f92e9544a86704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5481f424e3de353f5b53597bc4575bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe44477ab86824b68cb2ed2f03506951.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628560d39eeb0339fa00c9c15ab2c095.png)
(2)在平面向量中的学习中我们知道,若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb05247d3288b720d2fb2d229c224145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd43fef2164f434b20a6b3109f89929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e356a31707d7880b8946e605ff654c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a98eb935a8488bf322fe66fb7232ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3df12d1873787f67d8daaa1e51573f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6fbff85947f4df50ae1b17e967a158.png)
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2 . 已知
.
(1)求
和
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37056aafec13eadddb19e4caf2384d0b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29dd1b7b3b6fdeabf9dce7b202b69243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197b13413d706fee9ee08dda140a8886.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a282d19bf2c827a98d4443330f7ca1.png)
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解题方法
3 . 如图,扇形
的半径为
,扇形
的圆心角为
,
是扇形的内接矩形,设
.
![](https://img.xkw.com/dksih/QBM/2022/6/20/3005353409585152/3006085794725888/STEM/39a9a7d970ed4f2d92f30a8c3b6fe14e.png?resizew=184)
(1)求扇形
的弧长及面积;
(2)用
表示矩形
的面积
,并求当
为何值时,矩形面积最大及其最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134c3d2c318a33a82da4134dd17fa57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867d00157025729b6a66380810466edc.png)
![](https://img.xkw.com/dksih/QBM/2022/6/20/3005353409585152/3006085794725888/STEM/39a9a7d970ed4f2d92f30a8c3b6fe14e.png?resizew=184)
(1)求扇形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(2)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134c3d2c318a33a82da4134dd17fa57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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2022-06-21更新
|
700次组卷
|
3卷引用:广西桂林市第十九中学2021-2022学年高一下学期期中考试数学试题
解题方法
4 . 已知
,角
的对边分别为
,向量
,
,且
.
(1)求角
的大小;
(2)若
,
,求
的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0eb9fbb0d0b727f65d6c6d8b0d19bc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6369312240b6425c93293cb9989202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75facc3fb154fc96f015561c6b32491f.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f002f960ec07ea229ed243e2d991d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
5 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8edfd235ca2bc1420911415305dd396.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc903c19f7b3b0aa58cdb0cdb7b062a0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 已知函数
.
(1)求函数
的周期及单调递增区间.
(2)将函数
的图象上每一点的横坐标伸长到原来的两倍,纵坐标不变,得到函数
的图象.当
时,求
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccf896c0bff92b56977bcbe7ac94108.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc27b95ebad3ae7233c9ec2436b78d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
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2022-04-11更新
|
816次组卷
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3卷引用:广西桂林市奎光学校2021-2022学年高一下学期4月期中考试数学试题
7 . 已知函数
,则下列结论错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3024d87268513f44e8af9b1c10ff7ae.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() |
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2022-01-30更新
|
515次组卷
|
4卷引用:广西桂林市第十九中学2021-2022学年高一下学期期中考试数学试题
名校
解题方法
8 . 在
中,内角A,B,C的对边分别为a,b,c,且
,
,
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b4985c0e5e208ff4cdb4c24edb7348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459f5b94dd23f6369c9a791caceaa609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() |
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解题方法
9 . 已知
分别为
三个内角
的对边,
,且有
.
(1)求角A的值;
(2)求
周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ccf266d94c272a7edeee507e1d4ed00.png)
(1)求角A的值;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
10 . 下列给出了
ABC的三个条件,请从中选出一个填入题中的空格中,然后解答后面的两个问题.①
;②
;③
,已知
ABC中,
,且 .
(1)求角B;
(2)设锐角
ABC的面积为S,D为AC边上的中点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036d22a3fb8a37d7078c2b2ef54ad6e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298d110741a8ca09a017880914b74196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21736b89cc563ce9a45e2f2a9ba48793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
(1)求角B;
(2)设锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be62b4079f2d47a23a7b79d0728dadd.png)
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2021-11-12更新
|
254次组卷
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2卷引用:广西师范大学附属外国语学院2021-2022学年高二上学期期中数学(理)试题