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解题方法
1 . 已知
的内角A、B、C的对边分别为a、b、c,若
.
(1)求C的值;
(2)若
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9855c1b127573b92e041b5b42aacc0d5.png)
(1)求C的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e207b2baf056a7d6a6bde1f23bf12bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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2020-02-18更新
|
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4卷引用:福建省莆田第二十五中学2021届高三上学期月考二数学试题
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2 . 已知函数
.
求
在区间
上的最大值和最小值;
若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195b731ea4ad744ae8040d7dcc6bbe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ba47ed2a04f22ae6d9e1005ef58283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987d9ad7b0e8e64865bbcbc7530b2910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c115a95365af2b95400dfe30b3dc6c97.png)
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2020-01-01更新
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13卷引用:2020届福建省莆田第二十五中学高三上学期期中考试数学(理)试题
2020届福建省莆田第二十五中学高三上学期期中考试数学(理)试题湖北省襄州一中、枣阳一中、宜城一中、曾都一中四校2019-2020学年高三上学期期中数学(理)试题2020届湖北省四校(襄州一中、枣阳一中、宜城一中、曾都一中)高三上学期期中考试数学(理)试题广东省联考联盟2019-2020学年高一上学期质量检测数学(B普通)试题湖北省武汉市华师一附中2019-2020学年高一下学期4月月考数学试题(已下线)第10章 三角恒等变换(基础卷)-2020-2021学年高一数学十分钟同步课堂专练(苏教版2019必修第二册)黑龙江省哈尔滨市呼兰区第一中学校2021-2022学年高三上学期第二次校内检测数学(理)试题四川省泸州市泸县第四中学2021-2022学年高一下学期第一学月(3月)考试数学试题黑龙江省鸡西市鸡东县第二中学2022-2023学年高三上学期二模数学试题黑龙江省鸡西市鸡东县第二中学2022-2023学年高三上学期二模数学试题辽宁省铁岭市六校协作体2022-2023学年高三上学期第一次联考数学试题 第四章 三角恒等变换 单元测试卷-2021-2022学年高一下学期数学北师大版(2019)必修第二册广东省惠州市大亚湾区第一中学2023-2024学年高一下学期第一次月考数学试题
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3 . 如图,某园林单位准备绿化一块直径为
的半圆形空,
外的地方种草,
的内接正方形
为一水池,其余的地方种花,若
,
,
,设
的面积为
,正方形的面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a1568c0bf07f285b2e01c3a3a55900.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/8bd3eed2-76d3-41a9-823a-39a738813c09.png?resizew=186)
(1)用
表示
和
;
(2)当
变化时,求
的最小值及此时角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134c3d2c318a33a82da4134dd17fa57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01dcbd171693a47c5b932a5e84de10c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97901eeeec18b898e85961efd584a29b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a1568c0bf07f285b2e01c3a3a55900.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/8bd3eed2-76d3-41a9-823a-39a738813c09.png?resizew=186)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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2019-11-09更新
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4 . 求下列各式的值:
(1)求
的值;
(2)已知
,
,且
,
,求
的值.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e05bf04df05b22e35f9fd8ce663f2ba1.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f235d6fae415aa5d63a9541e1bd4ee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6642ecc7647dc422561bcbdd65cb1297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d63c534f2dbe6d6aff830c34c9e45a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1dc1e65772f7c4ac0ea50322dff3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db796b223b35e52aa7b4114da8072f5.png)
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2018高三·全国·专题练习
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5 . 已知函数f(x)=Acos
(A>0,ω>0)图象相邻两条对称轴的距离为
,且f(0)=1.
(1)求函数f(x)的解析式;
(2)设α,β∈
,f
=-
,f
=
,求tan(2α-2β)的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6ec92dde4963866908b7e3a8fda35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de12bbd5097debc83d6a46364589748.png)
(1)求函数f(x)的解析式;
(2)设α,β∈
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca351417c81e615b4e0b5293011e80c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b544304e1c93ee41f7f4b5cc009fea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35019336e62de7156a8160f1d544ed81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eba7d7a2659c28a1a9316083785490f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e6bd41fb5bc4195855feee60de9c1ba.png)
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6 . 设
为
中
的对边.求证:
成等差数列的充要条件是:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c1e84aaa7e1b5c1283075b36c72fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc94941f378c37ec89b7bffd54758ac7.png)
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7 . 已知向量
,
,
,函数
,已知
的图像的一个对称中心与它相邻的一条对称轴之间的距离为1,且经过点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5264fbdaca451ce027a218da19f6de.png)
(Ⅰ)求函数
的解析式
(Ⅱ)先将函数
图像上各点的横坐标变为原来的
倍,纵坐标不变,再向右平移![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
个单位长度,向下平移3个单位长度,得到函数
的图像,若函数
的图像关于原点对称,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb2e2e6f0b644a0fd6af1b990d7ca7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bc1172e66351b8f722e3113f2bc1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b836276b129138595efb24f4901216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7c208ba8783daca422e2b63940267da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5264fbdaca451ce027a218da19f6de.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)先将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bcaceadc00d891e292c8bdff9e4ce64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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8 . 已知函数
.
(1)求
的最小值;
(2)在
中,角
,
,
的对边分别是
,
,
,若
,
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1fdef10f2dbe51b6e85321553c1e6d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)在
![](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/ef3b6c5afd011cc6f69fe4865c27b1ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ee801d77158b229ca346f342d369958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036b23c94e305faaa1283996edc5b30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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7卷引用:福建省莆田第一中学2019-2020学年高三12月月考数学(文)试题
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9 . 在△ABC中,角A、B、C的对边分别为a、b、c.已知cosC=
.
(1)若
,求△ABC的面积;
(2)设向量
,
,且
,求sin(B-A)的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183a3a1f65fc548ebaeb238a167420c1.png)
(2)设向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc515d54d476501217d05e8932a4a1b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2954f00ff96909dd0884a5c33f710e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a2e9355333d43b0ca1616e86d27dca.png)
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5卷引用:福建省莆田第七中学2020-2021学年高一下学期期中考试数学试题