1 . 如图,A,B两地相距
,从A,B两处发出的两束探照灯光照射在上方一架飞机的机身上,则飞机的高度约为(结果精确到整数部分,参考数据:
)( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/2fa81b48-1013-4a4f-9449-3de1bd1dc47d.png?resizew=152)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff59f0186ccb5ee782849939b29d3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e564ac2688c99c2c7e69685c5200d78b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/2fa81b48-1013-4a4f-9449-3de1bd1dc47d.png?resizew=152)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 . 若角
的终边在第四象限,且
, 则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a76d03dab0981fefa901acea39501b2.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a077ceccea768ed3c664d38d55242fbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a76d03dab0981fefa901acea39501b2.png)
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2022-08-22更新
|
453次组卷
|
4卷引用:湖北省宜昌市协作体2022-2023学年高三上学期期中联考数学试题
名校
解题方法
3 . 在
中,
,
.
(1)求
的大小;
(2)在下列三个条件中选择一个作为已知,使
存在且唯一确定,并求出
的长.
①
;②
截得角
的角平分线的线段
长为1;③面积为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad3c6e6db8b60e4c455ef3b03961cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41bcc6a51705ff121781db4745677ad.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)在下列三个条件中选择一个作为已知,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7fc1a8a2e3f92c9df68f702b4b60cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0328e2ef403b6163a571926a6427351c.png)
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2022-04-12更新
|
1215次组卷
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3卷引用:湖北省宜昌市夷陵中学2022届高三下学期5月四模数学试题
解题方法
4 . 已知锐角
满足
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f8783429be686df75afcd56e847dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c02b53459eb0dbf71879b063cd75fb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知锐角
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c02b53459eb0dbf71879b063cd75fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f8783429be686df75afcd56e847dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c02b53459eb0dbf71879b063cd75fb.png)
A.-7 | B.7 | C.![]() | D.![]() |
您最近一年使用:0次
名校
6 . 方程
的两根为
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9fcaa804011c37873b03ee284504fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b0267faf4da1a44bce803e7c7f06656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aef681e03396ab434adb3d28bd26150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f156c184fcc19bb39426b713cdfc8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa6715b2d2ee5835207b2d881be02b76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9fcaa804011c37873b03ee284504fe.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
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2019-05-10更新
|
797次组卷
|
7卷引用:【校级联考】湖北省宜昌市部分示范高中教学协作体2018-2019学年高一下学期期中考试数学试题
名校
7 . 若
,
是方程
的两个根,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9fcaa804011c37873b03ee284504fe.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f156c184fcc19bb39426b713cdfc8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56e774c48d99c7834d4a02d855a5e95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc7020a8190bad286969fcb93951c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9fcaa804011c37873b03ee284504fe.png)
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2018-02-06更新
|
516次组卷
|
3卷引用:湖北省宜昌市第一中学2017-2018学年高一上学期期末考试数学试题
湖北省宜昌市第一中学2017-2018学年高一上学期期末考试数学试题湖北省钢城四中2017-2018学年高一下学期3月月考数学(文)试题(已下线)【课时作业】第3课时 两角和与差的正弦、余弦、正切公式的应用-2021-2022学年高一数学《新教材同步精典导学案》(人教A版2019必修第一册)
名校
8 . 已知向量
,向量
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31842bd1fd45139c4933752749bdf323.png)
(1)求函数
的最小正周期和对称轴方程;
(2)若
是第一象限角且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f100083ec2071245278beadd44a66f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fad6dc13dadb2de75ead0c06eea743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31842bd1fd45139c4933752749bdf323.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b7c054a369e0107f9005671358cf5d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39d95a6a4d566574f2922af7169c826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c36a3baf1c9ec666e9368e803017894.png)
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9 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b1029ae8e4120c872408387aea94a3.png)
__________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309a79e16690b5b2141e4986aad127ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b1029ae8e4120c872408387aea94a3.png)
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2017-07-03更新
|
426次组卷
|
2卷引用:湖北省宜昌市七校教学协作体2016-2017学年高一下学期期末考试数学试题