名校
1 . 已知下列命题:
①命题:“
,
”的否定是:“
,
”;
②抛物线
的焦点坐标为
;
③已知
,则
是
的必要不充分条件;
④在
中,
是
的充要条件.
其中真命题的个数为( )个
①命题:“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1464ad5c912d05a44974bd1c50e2e19a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8df0a803f27258017cbd0510b0ae0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5058f2641b369438a0347b7d72529f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b78fe304e1cf03b840a2262205574.png)
②抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc229bbefefbfe419495a49e115ae82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1156a8b29780810bd472f6d9e11b0e39.png)
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5171ca9257790093a79366e8a5251e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb9bace43ea5e7cb4de694b1765e92b.png)
④在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
其中真命题的个数为( )个
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
名校
解题方法
2 . 已知
,
,
分别为锐角三角形
三个内角
,
,
的对边,且
.
(1)求
;
(2)若
,
,求
;
(3)若
,求
的值.
![](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/7bef5239ddbb0972700ce01daf9ee7cf.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/d3d6b6340f64f78c12b6a34077d4d889.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783d6adfa8fb1352679c5185258d842a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79159294ac7ac0d85887ab209a197cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6625b034aa15afd1b2f1fb787b7cb816.png)
您最近一年使用:0次
2022-06-01更新
|
2035次组卷
|
7卷引用:天津市武清区杨村第一中学2022届高三下学期高考第一次热身练数学试题
天津市武清区杨村第一中学2022届高三下学期高考第一次热身练数学试题天津市第九十五中学益中学校2022-2023学年高三上学期开学检测数学试题天津市八校联考2022-2023学年高三上学期期中数学试题天津市南仓中学2022-2023学年高三上学期第一次教学质量过程性监测与诊断数学试题(已下线)2022年全国高考乙卷数学(文)试题变式题9-12题湖南省长沙市长沙县2021-2022学年高二下学期期末数学试题(已下线)2022年全国高考乙卷数学(文)试题变式题17-20题
解题方法
3 . 在锐角
中,内角
,
,
的对边分别为
,
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75d7452f8bea8fd08acd29572dfe7e0.png)
(1)求角
的大小;
(2)若
,
,求
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.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/f75d7452f8bea8fd08acd29572dfe7e0.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9af6b8933cb0bcc983a15c903b5892e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c02a1494361a6c133945c047e5310b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
4 . 已知
的内角
,
,
所对的边分别为
,
,
,
且
为钝角.
(1)求
;
(2)若
,
,求
的面积;
(3)求
.
![](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/9e672216ea27ba3a7ea84176cc8f3bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f11974b878b1c24185d84a3b978dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23725094c363fd158166a8698971694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0da7f69acefbbecdaf506c32176e71.png)
您最近一年使用:0次
2022-05-31更新
|
1409次组卷
|
6卷引用:天津市滨海新区塘沽第一中学2022届高三下学期三模数学试题
天津市滨海新区塘沽第一中学2022届高三下学期三模数学试题天津市外国语大学附属外国语学校2022-2023学年高三上学期第一次月考数学试题天津市朱唐庄中学2022-2023学年高三上学期期末数学试题(已下线)2022年高考天津数学高考真题变式题7-9题(已下线)2022年高考天津数学高考真题变式题16-18题广东省深圳市福田区福田中学2023届高三上学期第二次月考数学试题
名校
解题方法
5 . 在
中,内角A,B,C所对的边分别为a,b,c.已知
.
(1)求角C的度数;
(2)求
的值;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ea4f0ff188a0446ce00f55076177ccc.png)
(1)求角C的度数;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8120e471da616fd96428c532cd93184f.png)
您最近一年使用:0次
2022-05-24更新
|
985次组卷
|
5卷引用:天津市环城七校联考2022届高三下学期第二次质量调查数学试题
名校
解题方法
6 . 已知
的内角
的对边分别为
,且
.
(1)求
的值;
(2)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/ed5ac358bd877b127bb8730678be97fc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6fa9b3ebd39d5add347e187084544f.png)
您最近一年使用:0次
2022-05-23更新
|
1422次组卷
|
4卷引用:天津市九校2024届高三下学期联合模拟考试(一)数学试卷
名校
解题方法
7 . 在
中,点
是边
上一点,
.
(1)求
边的长;
(2)求
的值;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ece94b37f047e17c66fbda49282b71.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dcfa3e340b3976832d450dd4ae7e7a7.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40ba4475e82b162977579e8d32a8e649.png)
您最近一年使用:0次
名校
解题方法
8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a66f9cdf8b319a1bad2884edbb8aaac.png)
(1)求
的单调递增区间;
(2)三角形
的三边a,b,c满足
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a66f9cdf8b319a1bad2884edbb8aaac.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1275a53087eea8820ee57627707ace18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4b57c2a3297e19a86697999c090b34.png)
您最近一年使用:0次
2022-05-19更新
|
1385次组卷
|
8卷引用:天津市耀华中学2022届高三下学期二模数学试题
天津市耀华中学2022届高三下学期二模数学试题浙江省山水联盟2022届高三下学期5月联考数学试题宁夏回族自治区石嘴山市第三中学2024届高三第一次模拟考试数学(文)试题福建省漳州市第三中学2021-2022学年高二下学期期末考试数学试题(已下线)第05讲 正弦定理和余弦定理的应用 (高频考点—精讲)四川省宜宾市叙州区第二中学校2024届高三上学期期末数学(理)试题四川省宜宾市叙州区第二中学校2024届高三上学期期末数学(文)试题(已下线)专题11.3余弦定理、正弦定理的应用-重难点突破及混淆易错规避(苏教版2019必修第二册)
名校
解题方法
9 . 在
中,角
所对的边分别为
.已知
.
(1)求A的值;
(2)求
的值;
(3)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/bfba2789c1df65641ddc0bb746e2d160.png)
(1)求A的值;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37805b569421d7485cc59cf7a0c6fe29.png)
您最近一年使用:0次
2022-05-18更新
|
1043次组卷
|
3卷引用:天津市部分区2022届高三下学期质量调查(二)数学试题
名校
解题方法
10 . 在
中,
,
,
.
(1)求AB的长;
(2)求
;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264381eddf150479287e20be0007ef90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3578b63c5903089595bf324c809a997c.png)
(1)求AB的长;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc650d5d19b121734334cff3b81dd22.png)
您最近一年使用:0次
2022-05-18更新
|
1065次组卷
|
3卷引用:天津市和平区2022届高三下学期三模数学试题