在
中,内角
,
,
的对边分别是
,
,
,若
,
.
(1)求角
;
(2)若
为
的角平分线,证明:
.
![](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/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faaeeac3ad7c1946c4ebfb17a49e2e31.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b6e1e4294a8d83e0119ac5e91af71d4.png)
20-21高一下·福建莆田·阶段练习 查看更多[2]
更新时间:2021-08-16 15:09:09
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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】已知函数
,
, .
(1)求
在区间
上的值域;
(2)若
,
,求
的值.
请从①若
,
的最小值为
;②
图象的两条相邻对称轴之间的距离为
;③若
,
的最小值为
,这三个条件中任选一个,补充在上面问题的条件中并作答.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48eac6ca2aa3cc1594525b38d849aa09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a2691d6c11316950432599c204c9a0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7067a668d60d57a3b56ef720f29f635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4862e8ef531e0c86f40af0e4f657eb19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
请从①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f929bae605bfa2dd17e17024f844ed6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c875c55f2117fb4572265601f096895a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2a6c35384d6ebc5e47ffecb16c1d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c875c55f2117fb4572265601f096895a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
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解题方法
【推荐2】在
中,角
、
、
的对边分别为
、
、
,且
.
(1)求角
的大小;
(2)若
,
,求
的值.
![](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/b2e5387867c44fd8b2add4443c51f623.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39372e70f5465f8cf0c5ebf7653f0e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】请从下面三个条件中任选一个,补充在下面的横线上,并解答.
①
;
②
;
③
.
在△ABC中,内角A,B,C的对边分别是a,b,c,若 .
(1)求角C;
(2)若
,求△ABC周长的取值范围.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824d85f9ed21183d0f09e910f965c7d3.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f81fbb7995a6fe56d25c3a98658fe19.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615e4c77cde1ed48e4da810395aebda5.png)
在△ABC中,内角A,B,C的对边分别是a,b,c,若 .
(1)求角C;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】在
中,角A,B,C所对的边分别为a,b,c,且
.
(1)求角A;
(2)若
,
,求a,c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d858b2e2c1896485cc6a10b610a7cc1a.png)
(1)求角A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32b9057a53e1a34c6b57e670c062b6f.png)
您最近一年使用:0次
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适中
(0.65)
真题
名校
【推荐1】如图,
是直角
斜边
上一点,
,记
,
.
(1)证明
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae1b2a249841cb942fea24811feda9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b745b104d14c796fe555890201591b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/30/204b75d5-80f6-46d9-b0df-31bbed710f10.png?resizew=197)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f791f319e1dfa28d11c35c55e5a45e2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377fc9cc1b6ce499781661672e42ac28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
您最近一年使用:0次
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(0.65)
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解题方法
【推荐2】如图,在△ABC内任取一点P,直线AP、BP、CP分别与边BC、CA、AB相交于点D、E、F.
(1)试证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3303605b3c1ec532a18bd4cf4e46fe9b.png)
(2)若P为重心,
,求
的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/24/1cef3afd-1dd1-449b-84ec-2ae46c04cb39.png?resizew=122)
(1)试证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3303605b3c1ec532a18bd4cf4e46fe9b.png)
(2)若P为重心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbebab4378f2fce49884c192c4457993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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