已知函数
;
(1)求
在
上的最大值及最小值;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b8f858ac1cd80df9fa0c070aef2d17.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c9aeed3c8c5a04e48d011c607f9142.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9433353d73641646a01f388feabd844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59808060fa3984e6343d9a69767c6b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146fc0a63e5c14a8fa46573e60c07ba.png)
更新时间:2018-09-25 13:05:03
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdbf1db7b947d7124d6e76ccab7e80ba.png)
的最小正周期为
,且其图象经过点
.
(1)求函数
的解析式;
(2)若函数
,
,
,且
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdbf1db7b947d7124d6e76ccab7e80ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af43cf42d6b0bb52b6eba8b65e83b84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a0e41b7d20402d778713c8e0a4c160.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c066a800cd4b7011f1bff3db0efd87dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab10594b7dadac5b712b031bf3f4e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6215ea944592d70b0ba4596ec923649f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d9b3eb057cebe87129e570c9f1e3e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d99652dfa7c6ebdcfd414b27459075b.png)
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适中
(0.65)
解题方法
【推荐1】已知:在
中,内角
的对边分别为
,且
.
(1)求角
;
(2)设
,求
周长的取值范围.
![](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/8bc1174507eff13aa507a7d78f128aae.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.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
|
适中
(0.65)
解题方法
【推荐2】已知函数
,向量
,
,在锐角
中内角A,B,C的对边分别为a,b,c,且
.
(1)求角A的大小;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740710b92f3f3af8f447d1a12799ef81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b544ff8a70ba72b262d2b6e7a8e47ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8607f32bdefe49906c589ed27f6240b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d3c28e2fc237e76e757b8a82c619802.png)
(1)求角A的大小;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1520b4cb17b3ed210d144457db044587.png)
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解答题-证明题
|
适中
(0.65)
【推荐3】定义非零向量
的“相伴函数”为
(
),向量
称为函数
的“相伴向量”(其中
为坐标原点).记平面内所有向量的“相伴函数”构成的集合为
.
(1)已知点
满足
,求
的最小值;
(2)设
,其中
,求证:
,并求
的“相伴向量”的模的取值范围;
(3)已知
(
)为圆
:
上一点,向量
的“相伴函数”
在
处取得最大值.当点
在圆
上运动时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234eb91d6082d883d2c885ddfc629313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c6f29b2b1955715616003d51d8b77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234eb91d6082d883d2c885ddfc629313.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c6f29b2b1955715616003d51d8b77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(1)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6d8a4cf957865fad1cb648fcd2cbaa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9291cc14284d7a3a9644c4eb4e6fe14f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b752a668d7f591d14c6c3b1d5cb5b629.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345addfee60a3772f0aad8d38131e912.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9883e09b1ac40ccaebcaec21e2871c56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4967b02dcf5b76c0d5ce82417618aad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6d8a4cf957865fad1cb648fcd2cbaa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a353d1a988596880c0a48c2303d20c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e723e57753f0a4fe1ef8ca1aee0e2117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e0e24323fe73e5d9fc6136219306da.png)
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(0.65)
真题
解题方法
【推荐1】记
的内角A、B、C的对边分别为a,b,c,已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601f4ab2e3d88712a24e03a8c9bac352.png)
(1)求B;
(2)若
的面积为
,求c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456bf252bb79e84d4cacff278222f5ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601f4ab2e3d88712a24e03a8c9bac352.png)
(1)求B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2c06207565e9fa6a288a788e4ab2fd.png)
您最近一年使用:0次
解答题-计算题
|
适中
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名校
【推荐2】嘉峪关市第一中学高一数学组在一次探究性学习活动中,将参加活动的同学分成6个小组,每一组按照下列序号完成一个三角函数式的求值,然后由组长分别汇报本组的答案.汇报后发现各组的运算结果是同一个常数,于是老师引导大家进一步探究发现一般的规律……
;
;
;
;
;
.
(1)请你从上面6个式子中选择一个,求出这个常数;
(2)根据(1)的运算结果,将同学们的探究发现推广为一个三角恒等式,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645e0eed19379a3da7cf56cea6cb5469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2807258a635e79f7fe93f87c06d92f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbdd27d0f165b41f7b7565421530499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ff89c99a178cb2cf759bfb4fdf46504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c9a47d744268f66af18a41ea3a85cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc47e1434554c2759f353bef040b5294.png)
(1)请你从上面6个式子中选择一个,求出这个常数;
(2)根据(1)的运算结果,将同学们的探究发现推广为一个三角恒等式,并证明你的结论.
您最近一年使用:0次
【推荐1】在①
,②
,③
的面积为
,且
,这三个条件中任选一个,填入下面问题中,并求解.
在锐角三角形ABC中,角A,B,C对应的边分别是a,b,c,函数
的最小正周期为
,c为
在
上的最大值,且 ,求a-b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b86308eec25f94db0a5e7a58765206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dd0c2a4a1107ea28a418a7d281ef5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341d455284c0850829e1d0e0b5147761.png)
在锐角三角形ABC中,角A,B,C对应的边分别是a,b,c,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309f0e3717ee05573ea5f6f1733cb5d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea7e406afac9609ca4015d25066af1e.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,内角
所对的边分别是
.已知
.
(1)求角
的大小;
(2)若
,求
周长的取值范围.
![](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/0daa99647ee3fe0d6f307a925af1c15e.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d803e27871810c6b8a7d6169144dd61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐3】已知
是
的三个内角,若向量
,且
.
(1)求证:
;
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a6498cdbf476632ae79e606bd4a391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31cc7c30712049d3b0e8a0d5737786.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66bd071eb2f89041b2d19ef4de91c569.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e4b3925872524f1e231db3a8b00305.png)
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