名校
解题方法
1 . 已知
,则
的最小值为________ ,此时![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf94acb3bd44a7f5e4c14b47ca98c72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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2021-01-10更新
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476次组卷
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3卷引用:辽宁省辽阳市2020-2021学年高一上学期期末数学试题
2 . 在
中,角
,
,
所对的边分别为
,
,
.已知
,
,
,则
( )
![](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/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09921d9904335a83078262ce62a473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f85678de64dcc06b3efcdb6a127170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.5 | B.![]() | C.29 | D.![]() |
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2020-08-03更新
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3卷引用:辽宁省辽阳市2019-2020学年高一(下)期末数学试题
辽宁省辽阳市2019-2020学年高一(下)期末数学试题安徽省名校2019-2020学年高一下学期期末联考数学试题(已下线)6.4.2 正余弦定理(精练)-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)
3 . 已知
分别是
三个角
所对的边,且满足
.
(1)求证:
;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](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/69980641e73c8092b3f45949b932c63e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fd1e7b23db81e1cd71ac666322672f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08feda635819192cb8500f01d39372f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
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2020-03-18更新
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4卷引用:辽宁省辽阳市2019-2020学年高一下学期期中考试数学试题
名校
4 . 在
中,面积
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d101781c8c3695e34a6bd8c54990ed9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e3fc39d2b508cc1cae769a5e7266c0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-04-28更新
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3卷引用:辽宁省辽阳市2019-2020学年高一下学期期中考试数学试题
5 . (1)已知a<b<c,且a+b+c=0,证明:
.
(2)用分析法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b22c2eff8e9b519feb0c6a18d6fec0.png)
(2)用分析法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fded4be1cefb8466ad624711bb06e3.png)
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2019-12-06更新
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2卷引用:辽宁省辽阳市2019-2020学年高一上学期期中数学试题
6 . 在
中,角
,
,
的对边分别为
,
,
,在①
;②
;③
这三个条件中任选一个,补充在下面问题中,并作答.已知
是
上的一点,
,
,
,若_______,求
的面积.
![](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/8082bc760a2bcb52f8be5926a0f93602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf80640c07f0134149c6567a951bb75b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d999d38ff2b9f3405f931f31b27208e4.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/194a89a3dfdbb8ab3547fb9789245d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde9cb64ad52176fdef71b7446207b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
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8卷引用:辽宁省辽阳市2019-2020学年高一(下)期末数学试题
辽宁省辽阳市2019-2020学年高一(下)期末数学试题江苏省镇江市2019-2020学年高一下学期期末数学试题(已下线)6.5 平面向量的应用—正弦定理、余弦定理-2020-2021高中数学新教材配套提升训练(人教A版必修第二册)山东省2020届高三第一次仿真联考数学试题(已下线)专题6.4 正弦定理、余弦定理及其应用(精练)-2021年新高考数学一轮复习学与练重庆市缙云教育联盟2020-2021学年高二上学期9月月考数学试题2021届高三高考必杀技之结构开放题专练辽宁省朝阳市建平县2021-2022学年高二下学期期末考试数学试题
名校
7 . 若x>0,则
的最小值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79080c3c0f8ced701880c116b2fe630e.png)
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2卷引用:辽宁省辽阳市2019-2020学年高一上学期期末数学试题
8 . 设a>2,b>0,若a+b=3,则
的最小值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd5cbdd741d7f6e716b75481e26ec08.png)
A.2 | B.3 | C.4 | D.5 |
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2019-12-10更新
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2卷引用:辽宁省辽阳市2019-2020学年高一上学期期中数学试题
9 . 设非零实数
,
满足
,则( )
![](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/d73a8762584a880b6088638da65566cf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4卷引用:辽宁省辽阳市2020-2021学年高一上学期期末数学试题
10 . 下列函数中,最小值为2的是
A.![]() | B.![]() ![]() |
C.![]() | D.![]() |
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