在
中,角A,B,C的对边分别是a,b,c,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d47c05400f794bc7b964aae71c8ae2a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59c9a0dcbc0c40441c6e3de18583769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d47c05400f794bc7b964aae71c8ae2a.png)
2024·全国·模拟预测 查看更多[2]
更新时间:2024-05-16 15:31:37
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【推荐2】下列各式中化简正确的是________ (写出所有正确的序号)
① 若
,则
;
② 若
,则
;
③ 若
,则
;
④ 若
,则
;
⑤ 若
,
,则
;
① 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab8cd8f9700ab4115c887f3c95a45c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0058526abf9e0f6b3469d28be7bb6d85.png)
② 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda4a6cff1938676625423fcbb6f5938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6bd499bdc9d255ac35f30085b67eae.png)
③ 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda4a6cff1938676625423fcbb6f5938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b63c1e025cb2e6ce8a9004a8fb68368.png)
④ 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ee9857ce981a91b81ec5f42df71020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d429ee25b90bf968cd49ef010444da58.png)
⑤ 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64bac2fc7d5ecc76c4172a35d3ec84d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99074f989e74d5ff306b4b7b7a379c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eacab16defa37e2419a15b1abe6102c.png)
您最近一年使用:0次
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【推荐1】下列正确的是_______________ ;
①已知命题p:|5x-2|>3,命题q:
>0,则
是
的必要不充分条件;
②在△ABC中,A>B是
的充分不必要条件;
③在△ABC中,
是△ABC为锐角三角形的充要条件;
④在△ABC中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97ec04a1aa7ac6fce72d589864940a2.png)
>0是△ABC为钝角三角形的充要条件;
⑤在△ABC中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97ec04a1aa7ac6fce72d589864940a2.png)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305d5f36a9fdbc840161b36563923195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97ec04a1aa7ac6fce72d589864940a2.png)
是|
|=|
|的充要条件;
⑥两条直线互相平行是这两条直线斜率相等的充要条件;
①已知命题p:|5x-2|>3,命题q:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42809aaa1d8be488924325a665fa9e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
②在△ABC中,A>B是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
③在△ABC中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/166f792a201a8ff4a7c73aa5ec3aa026.png)
④在△ABC中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97ec04a1aa7ac6fce72d589864940a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
⑤在△ABC中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97ec04a1aa7ac6fce72d589864940a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305d5f36a9fdbc840161b36563923195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97ec04a1aa7ac6fce72d589864940a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
⑥两条直线互相平行是这两条直线斜率相等的充要条件;
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【推荐2】在△ABC中,若
,
,则△ABC的三个内角中最小角的值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a8b699123fb0e4ac44d26f7829aa08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac5663bb76fc8644a71e978c8e6a954.png)
您最近一年使用:0次
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解题方法
【推荐1】在
中,内角
的对边长分别为
,且
,
,则b的值为______ .
![](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/39e99e6a0e45e069ff2e9654383278ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b577879dbe407e11b603ef2250aaa3a1.png)
您最近一年使用:0次
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解题方法
【推荐2】在锐角
中,内角A,B,C的对边分别为
,且
,若D是
的角平分线与BC的交点,则
的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1ce06d0a1633dccfe9a8d11443c38d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28210f7d8e896a08f5caf8722beb65e6.png)
您最近一年使用:0次