在
中,内角
所对的边分别是
,已知
,
,
.
(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/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45373166e0a004b3b4d910655d409b94.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a38ee166d856f29b967efee1c5b516e.png)
2020·天津·二模 查看更多[3]
更新时间:2020-06-16 18:34:24
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】设向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
,其中
,
,且
与
互相垂直.
(1)求实数
的值;
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a560b8ff794c12dc8d194bcd2e3f3554.png)
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0420b9f3d4f6cf76d31755a546ea96bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1caf629bdf5b35bed3edca93a3ac4cb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf73db6da96b2e3ef7b70beecb22363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40023f865a81f56df2a052740a03df20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f63b469e9a116df216dc63b0ce3ec7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68d9c22a0d5e2397c64cb40647f73b3.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a560b8ff794c12dc8d194bcd2e3f3554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe427803eef028e4d698f3d677cfebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/110ed2cc78caf96551a5eb28a831742a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27687dd237df1abaaf26993532e82c6.png)
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解题方法
【推荐2】已知
为坐标原点,对于函数
,称向量
为函数
的对应向量,同时称函数
为向量
的对应函数.
(1)设函数
,求函数
的对应向量
;
(2)若向量
的对应函数
满足
,求
的值;
(3)若向量
的对应函数为
,且
,求
在区间
上最大值与最小值之差的取值范围.
![](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/234eb91d6082d883d2c885ddfc629313.png)
(1)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734c67a8ab3ebb1233006b0bfb50ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661d1a8ad817786dab892695880ef1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf8809610c7a9e59530bf319f29189a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48345d239aaf8e9ca1ff2846c08a99.png)
(3)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5403216cc93a9413ca330fc13b0df29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634c724698322471ccef44b1b61528fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07286db2a5af137e599d59ea52b08a33.png)
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名校
【推荐1】如图,在
中,角
的对边分别为
,已知
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/f72b1e52-f4e4-49fa-8082-5fd4a905a3e9.png?resizew=141)
(1)求角
;
(2)若
为
边上的一点,且
,
,
,求
的长.
![](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/dd9d517510ac5f41adb2e4b1084677bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e68c3d5796ad2e7f45818dd4ef4c06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/f72b1e52-f4e4-49fa-8082-5fd4a905a3e9.png?resizew=141)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](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/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e0c5cb53fd85b7a23f0580df6bb49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262e062dcdd2039084a356862b123e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
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(0.65)
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【推荐2】已知
的三个内角A,B,C的对边分别为a,b,c.若
.
(1)求角C的大小;
(2)若
的面积为
,c=
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24529ac0db20a4d444a2c21a5e342f24.png)
(1)求角C的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb57575dea540c569265de158429425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb57575dea540c569265de158429425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
您最近一年使用:0次