2011·浙江杭州·一模
解题方法
1 . 在
中,角A、
、
所对应的边分别是
、
、
,已知
,给出下列结论:
①
的边长可以组成等差数列;
②
;
③
;
④若
,则
的面积是
.
其中正确的结论序号是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/fec2c3d6ef7d1d369f8873965630373f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f19b00b3245cd862df64ac2c1c068f.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8036e5f384ceff16b7290d567556100f.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d447455ca3fa23710faaa4bd6b5d7c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c00f7e3c9b3ca278015e3ec031f102.png)
其中正确的结论序号是 .
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10-11高三上·黑龙江哈尔滨·期中
2 . 下面能得出
为锐角三角形的条件是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
10-11高三上·浙江杭州·阶段练习
3 . 已知点
,
.
(Ⅰ)若
, 求
的值;
(Ⅱ)设
为坐标原点, 点C在第一象限, 求函数
的单调递增区间与值域.
![](https://img.xkw.com/dksih/QBM/2010/10/26/1569865197797376/1569865203040256/STEM/96115bd8fb28449b93e87e970dbdeb33.png)
![](https://img.xkw.com/dksih/QBM/2010/10/26/1569865197797376/1569865203040256/STEM/2020dc31834e49a69b433a81d5d722e1.png)
(Ⅰ)若
![](https://img.xkw.com/dksih/QBM/2010/10/26/1569865197797376/1569865203040256/STEM/f42ec54692964d219c0d416bfb82d1ea.png)
![](https://img.xkw.com/dksih/QBM/2010/10/26/1569865197797376/1569865203040256/STEM/c98b82a7c77c417a87271f12586c414a.png)
(Ⅱ)设
![](https://img.xkw.com/dksih/QBM/2010/10/26/1569865197797376/1569865203040256/STEM/a1e62d7a758d4fbdb8202c1f9989f2d7.png)
![](https://img.xkw.com/dksih/QBM/2010/10/26/1569865197797376/1569865203040256/STEM/a5ca1d739521404cb7897237791bba9d.png)
您最近一年使用:0次
9-10高三·重庆·阶段练习
4 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5971848ee811ba1ea3cb0d886a4f5bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eba2a1e617487f4eb192f5d649fdcd.png)
(
),且函数
的最小正周期为
.
⑴求函数
的解析式;
⑵在
中,角
所对的边分别为
,若
,
,且
,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5971848ee811ba1ea3cb0d886a4f5bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eba2a1e617487f4eb192f5d649fdcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a4264a120d024e23271001bf86ecb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
⑴求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
⑵在
![](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/33249e413f2e5d4ae3fb8fa382322d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d804fbb070992ee12076b3f6289d843e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be4380bdcef1c542604a6ad61642c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881309775c3b6a9f4ed408838666342.png)
您最近一年使用:0次
2009·辽宁抚顺·二模
5 . 已知定点
,
是坐标原点,点
满足
,则
的最大值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd7896bc597eace8244823787047fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9139625abb8a616f8aeffa0f1a091e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d26c8ceac32ee5d79677afd525b62c4.png)
您最近一年使用:0次