解题方法
1 . 已知函数
的定义域为
,且
,则下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39c7e3b320e5da6212e14e5cd196e10.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024·全国·模拟预测
解题方法
2 . 已知角
满足:
,其中
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c9614cef40dc7e3702ee0103ed2d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4918f948caf07a42e62ea2694b811b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e2ac0bd4e46df2af5fd1a0c12aa510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f994ce52ecb3595f44bf21cc31966305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/592139276295e5661f06044442d0dca4.png)
A.1 | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
解题方法
3 . 在
中,
对应的边分别为
,且
.且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c9b04e29a3334fd8f6156e6e1f8aa1.png)
(1)求
;
(2)若
,
上有一动点
(异于B、C),将
沿AP折起使BP与CP夹角为
,求
与平面
所成角正弦值的范围.
![](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/271edf347d9890c3b4838fa35fc2b298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c9b04e29a3334fd8f6156e6e1f8aa1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668c8ab5abdba7173bcbe573ae87dad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df5935c893580c77ab6fa6eb0a70bdb.png)
您最近一年使用:0次