如图,在
中,D,E在BC上,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/554112ba-9c06-491f-a61f-dccc0dc04fa3.png?resizew=159)
(1)求
的值;
(2)求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc6b0519c2044a6ee8db6f8f6e98fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5cc2450dc300ce26b513c2abae28cab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/554112ba-9c06-491f-a61f-dccc0dc04fa3.png?resizew=159)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e3ebd5cc8680777b13268481d89bde.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
2023·河南新乡·二模 查看更多[8]
河南省新乡市2023届高三下学期第二次模拟考试理科数学试题河南省新乡市2023届高三第二次模拟考试数学(文科)试题(已下线)模块四 专题3 三角函数与解三角形(已下线)数学(新高考Ⅱ卷)(已下线)专题06三角函数与解三角形(解答题)(已下线)专题06三角函数与解三角形(解答题)广东省广州市白云中学2022-2023学年高一下学期期中数学试题(已下线)专题19 解三角形中的面积问题
更新时间:2023-03-26 11:48:51
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知函数
,
.
(1)当
时,求
的值域;
(2)当
时,求
的最小值
;
(3)当
时,若
,都
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd3a3919d899a4ba4fdc4535915a462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132f0e00fa18fa71bd5690f611565ff0.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3606fd3966dc72e0f8a32047945a86e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2ac429737efebf150a1bd088ba846.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a502fb55ff4e38716bb998058024f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038e0eccf27224b5045d3eb3dcf969a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29f5020d133f458912dc3da22b8127d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】对于定义域为
的函数
,若存在区间
(其中
,使得函数
同时满足:①函数
在
上是严格增函数或严格减函数;②当定义域是
时,函数
的值域也是
,则称
是函数
的“等域区间”
(1)若区间
是函数
的“等域区间”,求实数
的值:
(2)判断函数
是否存在“等域区间”,并说明理由;
(3)若区间
是函数
的一个“等域区间”,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc077ef229b488b6cc17e049a7290766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db40d5295942e85ec07a3728c7ad308d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db40d5295942e85ec07a3728c7ad308d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b85a97933a1d984f6e484b4021c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b85a97933a1d984f6e484b4021c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b85a97933a1d984f6e484b4021c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b85a97933a1d984f6e484b4021c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(1)若区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1756b564bf1d998d8179637011c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821d7db92cac974b503601b8fd4aea93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d8ebb83acd8f6a1fbc4c2e83e30756.png)
(3)若区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b85a97933a1d984f6e484b4021c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e79cdf39b413d40decc9ed72da95b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64da75a02173c2a5eb40f4c68d0f4f36.png)
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适中
(0.65)
名校
【推荐3】已知函数
.
(1)若
,求方程
的解集;
(2)若函数
的最小值为
,求实数a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10dda958e0a26731d73c3127f9ad484.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f9a575fc639253a8efe28ab73a985e.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a711a0b8c90ec23b7d449c0709746cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e35f76e01c3979ae5987f7729f9856.png)
您最近一年使用:0次
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适中
(0.65)
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【推荐1】已知
是等边三角形,D在BC的延长线上,且
,
.
![](https://img.xkw.com/dksih/QBM/2019/4/29/2192708899209216/2193780032552960/STEM/b7ec90fed26c498599bde01675cbaf7f.png?resizew=170)
(Ⅰ)求
的长;
(Ⅱ)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2acae81a72757bc109cb9d20665d90bf.png)
![](https://img.xkw.com/dksih/QBM/2019/4/29/2192708899209216/2193780032552960/STEM/b7ec90fed26c498599bde01675cbaf7f.png?resizew=170)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ffb3e5cc0762c907b1c9bc22e2df12e.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐2】在
中,
分别是角
的对边,
成等比数列,且
.
(Ⅰ)求
的大小;
(Ⅱ)若
,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ca9709c0e70e60abbd525b652e050d.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7bd6a578eb9fc465acc61ce8fc98aff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐3】已知向量
,函数
.
(1)若
,求
的值;
(2)已知
的三个角
的对边分别为
的面积为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/730594cb2aff1b9a3f0b7144cfe1c3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbadb801b4df353885a517d465a3929.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c7a0bddd47bb3203cd42d4eb5af0be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)已知
![](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/eabb3bea35f5af85077f047e42a62ac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eccdbaacf8be05bdf40a9338d25d9cc.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】在①
;②
;③
这三个条件中任选一个,补充在下列问题中并解答.
问题:在
中,角
、
、
所对的边分别是
、
、
,
,且________.
(1)求
;
(2)若
的最大边长为4,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3833304c706abf1eb7568b191dee7587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f86b0835b4360ba6c7f90bcf4b7490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66dbe8152e7be56ee15ffd0e88c4a3ca.png)
问题:在
![](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/0f2651f129d4fc46a9f79fd5d60a2670.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐2】请在①
;②
两个条件中任选一个,补充在下面的横线上,并解答.
在
中,内角A,B,C的对边分别为a,b,c,______.
(1)求角C;
(2)若
外接圆的周长为
,求
面积的最大值.
注:如果选择多个条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c086abd4798e0f69210d3fa2e0100e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f22e75337b00a062e258a0f8102c118.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)求角C;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9609625b502348556ff8ba32deac8caa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
注:如果选择多个条件分别解答,按第一个解答计分.
您最近一年使用:0次
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适中
(0.65)
名校
【推荐1】在
中,角
所对的边分别是
,已知
.
(1)求
;
(2)若
,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64227779dc64239d04eead02d1287d0b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036b23c94e305faaa1283996edc5b30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd04c6b9cc47521108979a622c2b7c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】已知有条件①
,条件②
;请在上述两个条件中任选一个,补充在下面题目中,然后解答补充完整的题目.在锐角
中,内角A,B,C所对的边分别为a,b,c,
,
,且满足______.
(1)求角A的大小;
(2)求
的面积.
(注:如果选择多个条件分别解答,按第一个解答计分.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7a722d6bc7ca3f4fe38e0f3b0d1c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea7ba6d601172bdd01f58e2aa52c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783d6adfa8fb1352679c5185258d842a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e876b53581904085bbc4e00fad0c718f.png)
(1)求角A的大小;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(注:如果选择多个条件分别解答,按第一个解答计分.)
您最近一年使用:0次