已知
中,角
,
,
所对的边分别为
,
,
,满足
.
(1)求
的大小;
(2)如图,
,在直线
的右侧取点
,使得
,求
为何值时,四边形
面积的最大,并求出该最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f23e226064eb14bf9a07f0e2fb2c140.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/d36d3e01-a6e3-4168-86b7-499d5e6102c7.png?resizew=142)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7f89fd7ddc3277cf27230a12d60f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
2023·湖北·一模 查看更多[3]
湖北省部分重点中学2024届高三上学期第一次联考数学试题(已下线)第六章 平面向量及其应用(压轴题专练)-单元速记·巧练(人教A版2019必修第二册)(已下线)专题12 正余弦定理妙解三角形问题和最值问题(练习)
更新时间:2023-11-09 15:38:02
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知函数
.
(1)求
的最小正周期;
(2)求
的单调递增区间;
(3)求
在区间
上的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0794212fc20bd981b660e364930c637.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0b1b34a0cb69bd9e0a4622b6352968.png)
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适中
(0.65)
【推荐2】已知函数
.
(I)求
的最小正周期;
(II)求
在
上的最大值与最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541aaa4caa9fa6a16a46bf393442c945.png)
(I)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(II)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408e2ab8ffcaa410e63b123c43250a2f.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】已知函数
在区间
上的最大值为3.
(1)求使
成立的x的取值集合;
(2)将函数
图象上所有的点向下平移1个单位长度,再向右平移一个单位长度,得到函数
的图象,若
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad60a0345ca6671b564975234dacc528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
(1)求使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/782aebe90d3ce38ea5cab55eeb89d3f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5f4aadc17b6d5c9760a75fab7fb760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f5ebb6329b996e7fe5be780e7ef082.png)
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【推荐2】
__________.从①
的最大值与最小值之和为0,②
.
这两个条件中任选一个,补充在上面问题中并作答.
(1)求
的值;
(2)求函数
的单调递增区间.
(注:如果选择条件①和条件②分别解答,按第一个解答计分)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2bcd9610fe9ec82ed043d46f60412b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82960d3cddbfdd407eb9730d647cf489.png)
这两个条件中任选一个,补充在上面问题中并作答.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(注:如果选择条件①和条件②分别解答,按第一个解答计分)
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【推荐3】已知函数
.
(1)求函数
的最小正周期和值域;
(2)若
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0ce8a3916eab66bfa8cbda7d3a08f0.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eda6af1f586e6974f7aea22ea5efba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81768239ce563660d10f63c6b485f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48345d239aaf8e9ca1ff2846c08a99.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐1】已知在
中,内角
所对的边分别为
,且满足
.
(Ⅰ)求证:
;
(Ⅱ)若
为锐角三角形,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/66cd29ffcb8599a96f55f76c8680d9aa.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa8d75a6638e08eedbff8662267da6f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
【推荐2】如图,在平面四边形ABCD中,AC=4,BC⊥CD.
(1)若AB=3,BC=2,CD=5,求
的面积;
(2)若
,求
的最大值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/17/7422992b-a918-4d08-82c2-abd7bd8aa795.png?resizew=146)
(1)若AB=3,BC=2,CD=5,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a52f460292281ed4fc0f48d72d9642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700b92106c301a8b7f7255e0fb33784e.png)
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(0.65)
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【推荐3】在
中,
分别是角
所对的边,且满足
.
(1)求角
的大小;
(2)设
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e8fe76fde5c357063eb66560ff186.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dcf9a778ac46bcdc324dd2115711a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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【推荐1】已知锐角△ABC的内角A,B,C的对边分别为a,b,c,
,
.
(1)求角A;
(2)若
,求△ABC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377977f13ccd5854e74951e95e26ec39.png)
(1)求角A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92840ac332a052ddc912349eb203c210.png)
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【推荐2】已知
内角
所对的边分别为
,面积为
,再从条件①、条件②这两个条件中选择一个作为已知条件(若两个都选,以第一个评分),求:
(1)求角
的大小;
(2)求
边中线
长的最小值.
条件①:
;
条件②:
.
![](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/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f2d26d5b0a12c5ec35a8fe1b5e19ab.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0daa492f23894259d265275d5c6ae72.png)
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