解题方法
1 . 在
中,角
的对边分别是
,已知
.
(1)证明:
;
(2)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208a4c388e34828499176c5bedeab16c.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc0f5f8d095ba277cd5e6409c4fdd81a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b64af28c24767dd9a64e49e5948c806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2017-10-03更新
|
450次组卷
|
2卷引用:河北省邢台市2018届高三上学期第一次月考数学(理)试题
2014·江苏盐城·三模
2 . 在
中,角
的对边分别为
,若
.
(1)求证:
;
(2)当
,
时,求
的面积
![](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/ce6df794797b2398a339319517c3bc8a.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1d5fd545ad966051d98b7ee0832015.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b46f8fd790b959d0ce74a6d8d884c951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6129fbf40a950fc8c516f0abaab21957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
11-12高一下·四川成都·阶段练习
解题方法
3 . 已知向量
,
,且
满足关系
(其中
)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35345d18663b63272e4c2f22ba066c5a.png)
(2)求将
与
的数量积表示为关于
的函数
;
(3)求函数
的最小值及取最小值时
与
的夹角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebcfd47ce43b1faea832fc0a28b5e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360c6b5f2ca5317e555e72ee2e6c51ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78cc09fdc22f99b486f0ee6d8109829d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35345d18663b63272e4c2f22ba066c5a.png)
(2)求将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e6cb8d4e39fa44f71df04b74f123f4.png)
(3)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e6cb8d4e39fa44f71df04b74f123f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
9-10高一下·辽宁·阶段练习
解题方法
4 . 已知⊙O的直径为10,AB是⊙O的一条直径,长为20的线段MN的中点P在⊙O上运动(异于A,B两点).
(1)求证:
·
与点P在⊙O上的位置无关;
(2)当
与
的夹角θ取何值时,
·
有最大值?
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd617bef78a0fb98cb66dc461926e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bdcac3ee21186e7a744c5f5a9e0144c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8254ef1aea5f68665145ac645822a95e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f819cd83cc83422c7a8c514cf47bdca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd617bef78a0fb98cb66dc461926e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bdcac3ee21186e7a744c5f5a9e0144c.png)
您最近一年使用:0次
2014·天津·一模
5 . 已知点A(-1,0),B(1,-1)和抛物线.
,O为坐标原点,过点A的动直线l交抛物线C于M、P,直线MB交抛物线C于另一点Q,如图.
(1)证明:
为定值;
(2)若△POM的面积为
,求向量
与
的夹角;
(3)证明直线PQ恒过一个定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954c8aa1386a017f5f8945e98cac3bb0.png)
(2)若△POM的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6799b234237333b0efa331d98f0374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec64476aaca08de0808afda3618109c.png)
(3)证明直线PQ恒过一个定点.
![](https://img.xkw.com/dksih/QBM/2014/7/24/1571826818867200/1571826824921088/STEM/3914336a-de5d-4b4b-a3b0-eefe4185e2ce.png?resizew=161)
您最近一年使用:0次