名校
解题方法
1 . 设
.
(1)若
都是锐角,且满足
,求证:
和
中至少有一个是方程
的解;
(2)求方程
在区间
上的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b5761cf39167d28827a635c3d1b267.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e50eedbf5aa992c26a645f7968c04ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9cb981a353e01806c9e18914247e528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1a4f3d0f4f608ea4e8481843d19429.png)
(2)求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1a4f3d0f4f608ea4e8481843d19429.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a531b9769bfba66a10139b153f09307c.png)
您最近一年使用:0次
名校
2 . 设
.
(1)若锐角
满足
,问:
是否为方程
的解?为什么?
(2)求方程
在区间
上的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed8cd3a2a92fd6b95700fd0a9bc5d3e.png)
(1)若锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e956fc04407b02700f649b9f1cbcad3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9e7131919449b3d2ebad852a1d78ff.png)
(2)求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9e7131919449b3d2ebad852a1d78ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e84e89ade5594c4665e43a320ca9f21.png)
您最近一年使用:0次