在
中,
,
,
.
;
(2)设
为
边上一点,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d23b9cf56fd0f72c5b3450280cf2556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21143d45f8a1eec5a18f3b82c78ac217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)设
![](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/35333abd7f02d663d15251bc5cbbf921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
22-23高一下·北京顺义·期中 查看更多[4]
更新时间:2023-06-19 00:26:00
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】
中,角
所对的边分别为
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0cbc6581fb2e61b5f0ff4de1a628fe0.png)
(1)试判断
的形状;
(2)若
的周长为5,且
,求
.
![](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/d0cbc6581fb2e61b5f0ff4de1a628fe0.png)
(1)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df95f72da4736d09b69875e40590e6e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】(1)已知
,
为锐角,求
的值;
(2)已知
,
为钝角,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f8783429be686df75afcd56e847dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850dba25bf0f5f13541bf9b6ec12b84d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed03f3ea950ad5624bbfba7639a3623c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐1】在
中,角
的对边分别为
.已知向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd5187bb69e522ab69664a25b5e06664.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943255fc04207b511143f6881a84c74b.png)
,.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbdd856684afc88a68eb08bad3545053.png)
(1) 求
的值;
(2) 若
,
, 求
的值.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd5187bb69e522ab69664a25b5e06664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fabd93c936282a29952b1982bdf6f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943255fc04207b511143f6881a84c74b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d869113f8cc87de339ebb1dfb1fe8c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbdd856684afc88a68eb08bad3545053.png)
(1) 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fa79a550591eb9e1bd07bced3a08fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐2】在
中,已知
.
(1)求
的值;
(2)若
是
的角平分线,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a662aa0e532a80f43297e74504fcc786.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
【推荐1】请从下列条件中选取一个条件补充在横线上,并解决你组成的问题:
①
,
;②
,
;③
,
.
问题:在
中,内角
,
,
的对边分别为
,
,
,满足
,且________.
求:(1)a的值;
(2)
的面积.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9adb9fd694606f1fb640f28acd3ecb4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82986ab38a4ae58593191ccae2a44f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0d1c42c57527b5bf2d5aaf6672b230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ae9d8eb5ad5d532edda9ca536ab6ae.png)
问题:在
![](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/2cafd77e96435add716708357a470ce1.png)
求:(1)a的值;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】△ABC的内角A,B、C的对边分别为a,b,c,若
.
(1)求A的大小;
(2)若
,___________,请在下列三个条件中选择一个作为已知条件补充在横线上,求c的值.(注:如果选择多个条件分别解答,则按第一个解答计分)
①
;②
;③
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7990b54c1947fecf3310794f7bce87.png)
(1)求A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea43cdd29ad1e9d4658072c68097aa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176ab58660b3e9067d8dc73e725a1dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d1eac105dd2a8f46addffecb0d8a1c.png)
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解答题-问答题
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适中
(0.65)
【推荐1】
的内角
,
,
所对的边分别为
,
,
.已知
,且
.
(1)求角
;
(2)若
,且
的面积为
,求
的周长.
![](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)
![](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/658757cea04b18891b2ca7ed971c2864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5030b196e6131e3c36e57e2f63dff9f.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a62f66ba24d6afef2b38482001e3182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c00f7e3c9b3ca278015e3ec031f102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知偶函数
的部分图象如图所示,
,
,
为该函数图象与
轴的交点,且
为图象的一个最高点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/dbb6b63f-1f28-421c-ac6f-8f3bcea39b68.png?resizew=219)
(1)证明:
;
(2)若
,
,
,求
的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982c278c0d8072e316f275d9c6e5b15e.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/dbb6b63f-1f28-421c-ac6f-8f3bcea39b68.png?resizew=219)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3d27073a4305ba8269ab98a13f0435.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde9cb64ad52176fdef71b7446207b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1287090703aac6d26361c4212862bcb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次