1 . 在
中,已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863840f613e5bab81cc0708528febfa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://img.xkw.com/dksih/QBM/2015/3/27/1572043989884928/1572043995103232/STEM/51164a6d773944f1a21acc30f727a0b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863840f613e5bab81cc0708528febfa8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 设
为锐角,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c268b2567df55e77387c917b7bf12752.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c268b2567df55e77387c917b7bf12752.png)
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2016-12-03更新
|
680次组卷
|
4卷引用:2015届山东省德州一中高三上学期1月月考理科数学试卷
3 . 在△ABC中,角A,B,C所对的边分别是a,b,c.已知(b-2a)cosC+c cosB=0.
(1)求C;
(2)若c=
,b=3a,求△ABC的面积.
(1)求C;
(2)若c=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
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10-11高一下·山东德州·期中
4 . 如果
且
,则角
所在的象限为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db914f592f34bba815abb8dab7a57c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d42ec4045351da88a49b00825cc68c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
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5 . 函数
的最大值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99acecda3c284c517bdb3aabbbe50814.png)
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6 . 已知α∈(π,
),sinα=﹣
,则cosα等于
![](https://img.xkw.com/dksih/QBM/2016/3/25/1572557855727616/1572557861216256/STEM/2ef0e60b84ce46f6aa434dc76bb3e68a.png)
![](https://img.xkw.com/dksih/QBM/2016/3/25/1572557855727616/1572557861216256/STEM/d3bce0e93a91423db520a90b70012537.png)
A.![]() | B.![]() | C.﹣![]() | D.﹣![]() |
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7 . 已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e3da6658f0630339be870036ea0b7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794d0314c16b5045beafd55f488bcf8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11a21c42c4eb7d800986463cdb3734a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e3da6658f0630339be870036ea0b7e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 设△ABC的内角A,B,C所对边的长分别是a,b,c,且b=4,c=2,A=2B.
(1)求a的值;(2)求sin
的值.
(1)求a的值;(2)求sin
![](https://img.xkw.com/dksih/QBM/2015/3/27/1572043989884928/1572043995455488/STEM/28f1b089421745029327afd858271023.png)
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9 . 在
中,角
的对边分别为
,下列结论中正确的选项有( )
![](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)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() |
D.若![]() ![]() |
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10 . 兴隆塔,建于隋朝,位于区博物馆内.某校开展数学建模活动,有建模课题组的学生选择测量兴隆塔的高度,为此,他们设计了测量方案.如图,兴隆塔垂直于水平面,他们选择了与兴隆塔底部
在同一水平面上的
两点,测得
米,在
两点观察塔顶
点,仰角分别为
和
,其中
,
,兴隆塔的高
的长是________ 米;此时多面体
的内切球的半径是__________ 米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137335385add246ec8aed081da03679c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f7daaafe649f5fad149391b5992f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0c6766bd801fa114221d0ab0bfa61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
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