在
中,角
的对边分别为
.
(1)求角
的大小;
(2)若
,求
周长的最大值.
![](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/456cd0355287892c1e9b72dd3824b78c.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6129fbf40a950fc8c516f0abaab21957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
23-24高二上·黑龙江齐齐哈尔·期末 查看更多[2]
更新时间:2024-01-12 13:34:24
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解答题-问答题
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适中
(0.65)
名校
【推荐1】已知函数
.
(1)当
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上的值域;
(2)在
中,内角
的对边分别为
为
的平分线,若
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,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fc3a9769dbd74b2160eeaafce83ead7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dcee772e6187ac31d7f8d69b0487000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01dc2d99655cf7598837cb0886166ed.png)
(2)在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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【推荐2】已知函数f(x)=sin(x+θ)+acos(x+2θ),其中a∈R,θ∈
.
(1)当a=
,θ=
时,求f(x)在区间[0,π]上的最大值与最小值;
(2)若f
=0,f(π)=1,求a,θ的值.
![](https://img.xkw.com/dksih/QBM/2018/8/1/2030691862364160/2038102425198592/STEM/d8367144259a4a05b86aa16a91a38bf5.png?resizew=57)
(1)当a=
![](https://img.xkw.com/dksih/QBM/2018/8/1/2030691862364160/2038102425198592/STEM/25454b97675e44eebc2cc7598ab6f35c.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2018/8/1/2030691862364160/2038102425198592/STEM/7fa06182159d4827868d1387d47b3d58.png?resizew=9)
(2)若f
![](https://img.xkw.com/dksih/QBM/2018/8/1/2030691862364160/2038102425198592/STEM/ebe900fe17ea4793809b639a15159c89.png?resizew=20)
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解题方法
【推荐1】在①
,②
,③
,这三个条件中任选一个补充在横线上,回答下面问题.
在
中,已知内角A,B,C所对的边分别为a,b,c,若___________.
(1)求A的值;
(2)若边长
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aef0fd9199af0f72978f8204a9fa062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c610f7b6d50768970cadb1b8aed611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a31c67a17e593e1c453749d92787dd.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)求A的值;
(2)若边长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
【推荐2】在
中,角
的对边分别为
,若
,且
.
(1)求角
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(2)若
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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/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93afad400a6d0bf8a91108b327383d87.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69225cfdfbc0a9a1ccfdd15c46353b8f.png)
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【推荐3】已知函数
.
(1)求
的最小正周期和单调区间
(2)若
,求函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d9fc0a480f4b109204733a2875e23e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0a5133b8460df6c46da0e44051e2a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解答题-问答题
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适中
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解题方法
【推荐1】已知△ABC的内角A,B,C的对边分别为a,b,c,且
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(1)求A;
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(1)求A;
(2)若△ABC的面积为
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【推荐2】
中,角
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445695d6526c44403a0ce78d831c4711.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038efc5708645c406dc128755393c930.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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解题方法
【推荐1】为了减少能源损耗,房屋的屋顶和外墙通常需要建造隔热层,某地正在建设一座购物中心,现在计划对其建筑物建造可使用40年的隔热层,已知每厘米厚的隔热层建造成本为8万元.该建筑物每年的能源消耗费用P(单位:万元)与隔热层厚度x(单位:cm)满足关系:
.若不建隔热层,每年能源消耗费用为9万元.设S为隔热层建造费用与40年的能源消耗费用之和.
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(2)当隔热层的厚度为多少时,总费用S达到最小,并求最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895821d09c90cafe70e1d39e9010b1d3.png)
(1)求m的值及用x表示S;
(2)当隔热层的厚度为多少时,总费用S达到最小,并求最小值.
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【推荐2】已知二次函数
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(1)若
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(1)若
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(2)若
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您最近一年使用:0次