解题方法
1 . 已知
,且
.
(1)求
值;
(2)若
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8211eff22395caabb1e2101fe34457af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a892dbcef7934d97016bb190d94e0bc3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099af9e199d2d7a3cf41a54a0e63bcf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38064db806c1d505932ad82f4c6521d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a91f74d77a9603558a65154d286057f.png)
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2 . 在
中,角
、
、
所对的边分别为
、
、
,
,当角
取最大值时,
的周长为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd63cf4764668d841586ef0da303279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12230ca217d189591ab2a49a3f972a82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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4卷引用:湖南省长沙市长郡中学2019-2020学年高三10月月考数学(理)试题
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3 . 已知
,
,求
以及
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4547118a3922635bc6dbd7b10f8980fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd26dba7b882b2952565de10a9ce9043.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ab71db6a8cc51182c9c07328aafe3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7945f939a36d44c8adc5f2c22b5291.png)
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2019-03-17更新
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8卷引用:湖南省长沙市宁乡市2019-2020学年高一上学期期末数学试题
4 . 下述四个结论
①若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a455965bf97adf239db6da9cdb17e0ea.png)
②已知扇形的半径
,圆心角30°,则扇形的弧长是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26390a4c601ab474be46341e5f72a526.png)
③函数
是单调递增函数
④化简
得到的结果是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47153fdd73c0661fa460130082e30929.png)
其中所有正确结论的编号是( )
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca24341509c05e672999202f2df0ebaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a455965bf97adf239db6da9cdb17e0ea.png)
②已知扇形的半径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ec556703fc98d32003759064c20b14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26390a4c601ab474be46341e5f72a526.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffa8ddcbbe89ab0f250f56673e2d36c.png)
④化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2db28b7fc3f9749135ebcf58b8b5497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47153fdd73c0661fa460130082e30929.png)
其中所有正确结论的编号是( )
A.①② | B.②③ | C.②④ | D.②③④ |
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5 . 已知
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f63dc02238b087ff47e9aa5bf6759d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bc052a11cf1a01445992672dde2836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c02b53459eb0dbf71879b063cd75fb.png)
A.![]() | B.7 | C.![]() | D.![]() |
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6 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48010b53d28cbd663a5542c4ceee6f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8712e694094827b2e9b5abfc42ec75d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2卷引用:湖南省长沙市雅礼中学2021-2022学年高二上学期入学考试数学试题
解题方法
7 . 已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccecdd34f65f4138e9a2f9a22f4d2ae6.png)
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccecdd34f65f4138e9a2f9a22f4d2ae6.png)
求:(1);
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09015d8fff755af5e436e34489f695cc.png)
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解题方法
8 . 如图是某斜拉式大桥的部分平面结构模型,其中桥塔
,
与桥面
垂直,且
米,
米,
米.
为
上的一点,则当角
达到最大时,
的长度为________ 米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f186ea827f7becafd1ac4955e22c6812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbf1667b21a273bf5dd007d65eeda7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
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湖南省常德市第一中学2023-2024学年高一上学期期末考试数学试题2019届安徽省蚌埠市第二中学高三下学期4月质量检测数学(文)试题(已下线)考题猜想01三角-期末考点大串讲(沪教版2020必修二)
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9 . 在平面直角坐标系xOy中,角α与角β均以Ox为始边,它们的终边关于y轴对称. 若角α的终边经过点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1fb3a59161b58a1e6577faa9fe1fe31.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cceff0e7d103475c3ba9a2712f373185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1fb3a59161b58a1e6577faa9fe1fe31.png)
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