△ABC的内角
的对边分别为
,
.
(1)求
;
(2)若
,求
.
![](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/bde16fedd7111a7b3d1994874a4c925a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4be4d71b8d56324838b10ef8c8e58f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09cfa9e7aca0c09c66041feee94162d9.png)
更新时间:2022-07-20 21:23:51
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解答题-问答题
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适中
(0.65)
【推荐1】已知函数
(
,
,
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/e91ed20d-4972-42f7-9999-8141248b1cfc.png?resizew=179)
(1)求函数
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(1)求函数
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e88a3313f76c6c4b1c876dd009acb88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac40b5b9c7c83924404be15ff1a7a96.png)
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适中
(0.65)
名校
【推荐2】已知向量
=(
,
),
=(
,-
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.
(1)用cosx表示
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+
|;
(2)求函数f(x)=
·
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+
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff170e5409e05252c3cfd8165688b43d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778662c16848db470c6537705b8a839c.png)
(1)用cosx表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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(2)求函数f(x)=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐3】已知函数
.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41857cd0d8829c09d1d5e787a7e99b1d.png)
(1)求
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(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3207791fb9b718adbcf16907fbc9cf.png)
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【推荐1】从以下三个条件中任选一个补充在下面问题中,并完成解答.
①
;②
;③
.
记
的内角
的对边分别为
,已知______.
(1)求
;
(2)若
,求
的面积.
注:如果选择多个条件分别解答,按第一个解答计分.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5471d007896ca6bdba93e24301c04ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171eb2e969cb5ae054b16882b4dd27c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5718973b297997037cea33d09f6c6d.png)
记
![](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)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c759e63d583983986ed53eb9b06fbf89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
注:如果选择多个条件分别解答,按第一个解答计分.
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解题方法
【推荐2】在
中,
的对边分别为
,已知向量
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,且
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(1)求
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![](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/db12b31f102a6335224be57177ef86fc.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/169488d6e49c88d14e9d23419c255568.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)若点D为边AB上一点,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b8558194f7f94260d80e6ce894ecbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
解题方法
【推荐1】在①
,②
,③
三个条件中任选一个补充在下面的横线上,并加以解答
在
中,角
,
,
的对边分别为
,
,
且______,若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1ba07e7a73d022b99743224c61a745.png)
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在
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解题方法
【推荐2】在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d01356052ef9619fe3a9f8d3b3e5bab.png)
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(2)求
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