如图,在平面四边形
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/6a2b1236-1d22-4e3a-bc86-08dfbe1a6712.png?resizew=220)
(1)若
,
,求对角线
的长;
(2)当
,
时,求平面四边形
的面积的最大值及此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb8367c2958cd0645d236fe837e4282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0f368dc09e739752d37586e12e4c05.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/6a2b1236-1d22-4e3a-bc86-08dfbe1a6712.png?resizew=220)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714af52513f8a9b03847730ec57f83cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d371362462decaa4a2b747c597c54c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231e0e84306bd7a86028fb10f9b66820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
22-23高三上·河南·阶段练习 查看更多[5]
河南省名校联考2022-2023学年高三一轮复习诊断考试(一)理科数学试题湘豫名校联考2022-2023学年高三上学期10月一轮复习诊断考试(一)数学(文科)试题湘豫名校联考2022年10月高三一轮复习诊断考试(一)数学(理科)试题(已下线)专题02 正余弦定理在解三角形中的高级应用与最值问题(精讲精练)-2江苏省宿迁市宿豫中学2022-2023学年高一下学期期中模拟数学试题
更新时间:2022-10-10 16:12:48
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【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d47513223d9d3101c21e6a3b0e3ebbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
(1)求
的最小正周期和对称中心;
(2)求
的单调递减区间
(3)求
在
的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d47513223d9d3101c21e6a3b0e3ebbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
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【推荐2】已知
为坐标原点,对于函数
,称向量
为函数
的伴随向量,同时称函数
为向量
的伴随函数.
(1)设函数
,试求
的伴随向量
,
(2)记向量
的伴随函数为
,函数
,
①函数
在区间
上的最大值为
,最小值为
,设函数
,若
,求函数
的值域.
②把函数
的图象向右平移
个单位,得到函数
的图象,对于
,是否总存在唯一的实数
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c6f29b2b1955715616003d51d8b77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234eb91d6082d883d2c885ddfc629313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b73836b73b1808fa376ed96a9c85c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2183ba00d69af06d9a950469b38cfe4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
(2)记向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e0064af62f1f04c857a732e4f440c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634c724698322471ccef44b1b61528fe.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7696508180d50353f80391088ff3c7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e93d044f7bde4330e206b4edd2bd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26c2d48c264304810689c150770f681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec9e237c17c09213d8102e33c16dad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f753e52eb14dbe8e5831e0951b054e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
②把函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27baf05c4898c79f80aabf8fbb44e7fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39371adfa42c12d8956e062879e8ff7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d0ecdc4e948482a9f878255e2c6bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f0fdc707b18f83bc182d42b6324b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】(1)化简:
;
(2)求证:
-2cos(α+β)=
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc47a70478035627d28cb82052d9eee.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58dfb35ddbde143472f429305dd193da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8d157b2358cc901983d432c9cb66e8.png)
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【推荐2】在锐角
中,角
所对的边分别为
,已知向量
,
,且
.
(1)求角
的大小;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff214d99784c6b23b7784bdaf3ed37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e2557d6c0eeb8e56c84db1c4931c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f13a05f5aca98574bb1f927123490de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4551756f470ca498251c40de37079f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34e673e78cd1e6df8a6660ac7cdad3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2758285d3c1d8c16784edbc5f572fc26.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c04cdad1facc0cdd3e84af0ef6a1b9.png)
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【推荐1】在
中,角
的对边分别为
,已知
.
(1)证明:
;
(2)若
,求
的面积.
![](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/d945c75c4507b2fd2b42493fa8db59df.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cb21ae875f36d52d0b6f82b0201d0e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/436e566dcc65889d01c7ea9453530b78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】在
中,内角A,B,C的对边分别为a,b,c,已知b=2,a=
,A=
.求B,C及边c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
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【推荐3】十字测天仪是广泛应用于欧洲中世纪晚期的航海领域的仪器,用于测量太阳等星体的方位,如图1所示,由杆AB和横档CD构成,并且E是CD的中点,横档与杆垂直并且可在杆上滑动.十字测天仪的使用方法如下:如图2,手持十字测天仪,使得眼睛可以从A点观察.滑动横档CD使得A,C在同一水平面上,并且眼睛恰好能观察到太阳,此时视线恰好经过点D,DE的影子恰好是AE.然后,通过测量AE的长度,可计算出视线和水平面的夹角
(称为太阳高度角),最后通过查阅地图来确定船员所在的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/dc58ccbe-9e83-458d-95e4-eb8acde3db9e.png?resizew=392)
(1)若在某次测量中,横档CD的长度为20,测得太阳高度角
,求影子AE的长;
(2)若在另一次测量中,
,横档CD的长度为20,求太阳高度角的正弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/dc58ccbe-9e83-458d-95e4-eb8acde3db9e.png?resizew=392)
(1)若在某次测量中,横档CD的长度为20,测得太阳高度角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b528818e98c5c2ddf301048b4228d2.png)
(2)若在另一次测量中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0e847821c95966efc534f26fbe4f6d.png)
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【推荐1】已知在
中,边
,
,
所对的角分别为
,
,
,
.
(1)证明:
,
,
成等比数列;
(2)求角
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3aa688caadfeb5bdf9c7dfecb5afa31.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/cce1b62b293c30f65aa28b468bbb2823.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3aa688caadfeb5bdf9c7dfecb5afa31.png)
(2)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐2】在
中,角A,
,
的对边分别是
,
,
,且向量
与向量
共线.
(1)求
;
(2)若
,
,
,且
,求
的长度.
![](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/be3a908d20b86ae5ff1a6df7e11e2718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df1fa8ae3bddaf1cd65857be06f2224.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1311f32edf13f8caee5edb03f24a7ba.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2449982298e35e2f1bf9082d1f5edf62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae7888d643678ea18f83f3237732052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8e2b380189700530b3352b501c532d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75316167a0915c97d63f5a53e212fe20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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【推荐3】在△
中,角A,B,C的对边分别为a,b,c,且
,
是方程
的两个实根.
(1)求
和
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f7edad7bcac4fa6852735297b604d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d9e809a1cc6027a39e249be7fb1978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38301d048f94b6449a1d4fcf996dc749.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e7a383f0b12515391621ee13fddafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0577566dbcc526fb6f783491a4784902.png)
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