12-13高三·河北唐山·开学考试
名校
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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0ae8e92dd3119d41f2c830ea526516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ace74bfb716753490ebe0e740ff5baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f08934f5d35416234e87e06fa16b963.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/1ba0ff3a3d932f26b6e93971aaeadc91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2016-12-02更新
|
3151次组卷
|
5卷引用:2015届云南省师大附中高三高考适应性月考理科数学试卷
2 . 在
中,角
所对的边分别为
,函数
,在
处取到最大值.
(1)求角
的大小;
(2)若
,求
的面积.
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573117252911104/1573117259210752/STEM/fb834f30dc7f499d962bbce21dbd9484.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573117252911104/1573117259210752/STEM/876a650384b740d892c69add4281e15a.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573117252911104/1573117259210752/STEM/e743f017dbb54827abcdedbb877d3a6f.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573117252911104/1573117259210752/STEM/7ddd551217754817875cf5b87d004a26.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573117252911104/1573117259210752/STEM/1376bc6db2654d44a9bba748d28aaba4.png)
(1)求角
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573117252911104/1573117259210752/STEM/ab8c5a61900741c19161707be8cc1348.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573117252911104/1573117259210752/STEM/b11b9bfff5004a619c3294c77347a175.png)
![](https://img.xkw.com/dksih/QBM/2016/11/3/1573117252911104/1573117259210752/STEM/fb834f30dc7f499d962bbce21dbd9484.png)
您最近一年使用:0次
解题方法
3 . 已知
的内角
的对边分别为
,且
.
(1)求
;
(2)若点
为边
的中点,
,求
的值.
![](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/7c8c4702389edb63ed7684c77e1e42d7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9639896487e6cf18e8fd02d2a7ed2087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c3f982d999937891eec4cb22d62e5f.png)
您最近一年使用:0次
4 . 已知
的内角
的对边分别为
,且
.
(1)求
;
(2)若点
为边
的中点,
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.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/f4d75ef4b3cccc9c3895012c7fa3f95b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
您最近一年使用:0次
5 . 设
的内角
所对的边分别是
,且
.
(1)求角
的大小;
(2)若
,求
的周长
的取值范围.
![](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/afae852d644f1dbcb18fa2ab5bdb6e4c.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
6 . 已知
中,角
所对的边分别为
,且满足
.
(1)求角
的大小 ;
(2)若
,求
周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21188235367fa6528e1ce81de448f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324ac4799d95ed40f48803405dfa779c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6187436bcc96bb0a335483390a885a45.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
您最近一年使用:0次
7 . 在
中,角
的对边分别为
,且
,
,
(1)求角B的大小;
(2)若等差数列
的公差不为零,且
=1,且
成等比数列,求
的前
项和
![](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/4df806de6b8702d37e9256104206ef21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0c06c2aa2332b71ce32d764975fc84.png)
(1)求角B的大小;
(2)若等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://img.xkw.com/dksih/QBM/2016/1/21/1572459094532096/1572459100848128/STEM/6be1519e5e764a1580f17daf31ef6f1a.png?resizew=63)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b1b845916a4b6a18cdfbcd308d09c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6c74d1c24b2c8b81cbd6265c7767a0.png)
![](https://img.xkw.com/dksih/QBM/2016/1/21/1572459094532096/1572459100848128/STEM/bd10924f6f7f4897a147817838ad4ac3.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2016/1/21/1572459094532096/1572459100848128/STEM/c0f16e1b4f01435290515e09dd825a60.png?resizew=20)
您最近一年使用:0次
2016-12-04更新
|
517次组卷
|
2卷引用:2016届云南省玉溪一中高三下学期第一次月考理科数学试卷
解题方法
8 . 设
的内角
、
、
所对的边分别为
、
、
,且
.
(1)求角
的大小;
(2)若
,求
的周长
的取值范围.
![](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/afae852d644f1dbcb18fa2ab5bdb6e4c.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2016-12-04更新
|
686次组卷
|
2卷引用:2016届云南师范大附中高考适应性月考三理科数学试卷
9 . 如图,某炮兵阵地位于A点,两观察所分别位于C,D两点.已知△ACD为正三角形,且DC=
km,当目标出现在B点时,测得∠BCD=75°,∠CDB=45°,求炮兵阵地与目标的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2016/1/5/1572414968356864/1572414974459904/STEM/6c3f45721760461cb4c209a6ae4f0ee0.png?resizew=122)
您最近一年使用:0次
2016-12-03更新
|
386次组卷
|
2卷引用:2015-2016学年云南省景洪市三中高二上学期期中考试数学试卷
名校
10 . 如图所示,在四边形
中,
,
,
;
为
边上一点,
,
,
.
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572052351975424/1572052357808128/STEM/9a3c1c7e-fb49-4459-82a6-f21dd78b0785.png?resizew=262)
(Ⅰ)求sin∠CED的值;
(Ⅱ)求BE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d42bcec0c3cbc96a50bc8a6d2c8986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0878ec701aeec4e177c0728d237edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5656661f1d7fd5b403d1dd39d1adfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f713da7dce54965bbef060ad2b507e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec3dbe63f0ace2f8095d43d52966b20.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572052351975424/1572052357808128/STEM/9a3c1c7e-fb49-4459-82a6-f21dd78b0785.png?resizew=262)
(Ⅰ)求sin∠CED的值;
(Ⅱ)求BE的长.
您最近一年使用:0次
2016-12-03更新
|
909次组卷
|
3卷引用:云南省昆明市第三中学2022届高三上学期第二次综合测试数学(理)试题