1 . 在
中,
,
,
,点
在线段
上,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5489aaa6dc00789fcf126bf2fd744a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
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2 . 在
中,角
所对的边分别为
,
,
的平分线交
于点
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4a1e56da3635e24d4e1e15e38f192e.png)
________ .
![](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/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4a1e56da3635e24d4e1e15e38f192e.png)
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解题方法
3 . 在
中,内角A,B,C的对边分别为a,b,c,已知
.
(1)求角
的大小;
(2)若
,求
的周长l的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3706eb7893966651ccae124623fecc4.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
名校
4 . 将
弧度化成角度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
5 . 下列说法正确的是( )
A.正切函数![]() |
B.正切函数![]() |
C.正切函数![]() ![]() |
D.正切函数![]() |
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6 . 已知函数
,若存在
,使得
恒成立,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1884b6ab8284960e82f6a0d6550c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66a2d7f722c7da1c50a71c1a8f4dc9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f3d3a69c957ff30a5b76a00b7740e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
7 . 已知角
的终边经过点
,则
=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7eb8d05dde58ff0013f917179812c5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7645a3fae61dc6e8bd56b2fa84b7b6d4.png)
A.2 | B.3 | C.4 | D.6 |
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8 . 用三角函数线比较sin 50°和cos 50°的大小,正确的结果为( )
A.![]() |
B.![]() |
C.![]() |
D.sin 50°和cos 50°无法比较 |
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解题方法
9 .
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a526988df70a44bc93f4bd7f615bfdf1.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10 . 若
是第四象限角,则点
在第( )象限.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a3f6a8c412b6bbe4e95950b878331c.png)
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
您最近一年使用:0次