如图,锐角
的始边与x轴的非负半轴重合,终边与单位圆交于点
,将射线
按逆时针方向旋转
后与单位圆交于点
.
![](https://img.xkw.com/dksih/QBM/2021/6/22/2748275012640768/2748336981934080/STEM/30958d3846974e2a884041d29c17e35a.png?resizew=173)
(1)求
的取值范围;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad8f30bbf15e39fc8c12e0b5233e551.png)
![](https://img.xkw.com/dksih/QBM/2021/6/22/2748275012640768/2748336981934080/STEM/30958d3846974e2a884041d29c17e35a.png?resizew=173)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794f2c6bd63355105d179d11306a9cae.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8f0d7f2b31d2cb1c2847d956a5690e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
20-21高一下·江苏·阶段练习 查看更多[4]
江苏省园三2020-2021学年高一下学期5月第二次月考数学试题江苏省苏州市园区三中2020-2021学年高一下学期5月阶段检测数学试题(已下线)专题5.2 同角三角函数的基本关系与诱导公式(练)- 2022年高考数学一轮复习讲练测(新教材新高考)苏教版(2019) 必修第二册 过关斩将 章节测试 第10~11章 三角恒等变换、解三角形
更新时间:2021-06-22 09:28:48
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解答题-证明题
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解题方法
【推荐1】锐角
中,角A,B,C所对应的边分别为a,b,c,
.
(1)求证:
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e8c97f07697920a73a3553df9bf3115.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa8d75a6638e08eedbff8662267da6f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ce02259a85ea191541f4a708738f1.png)
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【推荐2】函数
,
其图像过定点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/214a82d928d83eb351c554abee8f64b4.png)
(1)求
值;
(2)将
的图像左移
个单位后得到
,求
在
上的最大和最小值及此时对应的
的取值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62209caf3d1a0304c2883c4e71b80ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b3b822c39e63c6c930e7fc7b04b3b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/214a82d928d83eb351c554abee8f64b4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c487fec20bd809e0baf5cb39afe8979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28ebfff8ce2b002d0314aaf9d0a129f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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解题方法
【推荐1】设
为锐角,已知
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bc052a11cf1a01445992672dde2836.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857c59f31a9d4fd9c6f0b4dbb4131a5f.png)
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【推荐2】已知函数
,
,
的图像整体向右平移
个单位后图像关于原点对称.
(1)求
的单调递增区间;
(2)若
,且
,
,求
和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2626a5bdd100424d2416a665ba0e9518.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c9e46448bc791c441ca02d8f4508eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aeb076bad84890e24dbdc945ad543cb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da176504ad29d9012b4ce0098e0449cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a42c20da8e5c30db872a47f664432f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b3928aeb4c47b47e63dd47f71077605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dd85733055029ce0c882d862757c3c.png)
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解题方法
【推荐1】在
中,内角
,
,
所对的边分别为
,
,
.已知
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/debaa753691d7fd95b20fcc1386e4ea8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dffc610600a1abdfac3b448c91aad23.png)
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【推荐2】已知函数
,
是函数
的一个零点.
(1)求
的值;
(2)若
、
,且
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b93b6cd2788d8e093f1d7002c65325be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b9082ee8dab6c1e4e325c9db6b9f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89236128a7de271c8d20ddbea4b962fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e669d64677ddbd0390411d5ce74ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b04da7eac640b5b735da7fb5da8cfd.png)
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【推荐3】已知向量
,
,
.
(1)求
;
(2)若
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d888da739a15462867cfab588b259f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7fce57b53367920754873e300ba190a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae9f908aabcd9d9c46a0ecdfd1d6c12.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d86f968d92b1fa12c2322e09f508957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65b6c42393fae47c51101713167ff71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
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解题方法
【推荐1】如图,在
中,
分别为边
上一点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/7e5b713b-9312-4675-88dd-38ffa74687b1.png?resizew=73)
(1)若
,求
的长;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3595e5804293d8a4d729285507e3e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1f94af7f35686f4a8a268392abc9ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e373c3669ccc1762a3a704f5ff7bcb7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/7e5b713b-9312-4675-88dd-38ffa74687b1.png?resizew=73)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea317fa298fb1618866aedc34765a0d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8292ee917974ead96b5176ba3faf8bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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【推荐2】如图,已知OPQ是半径为1,圆心角为
的扇形,C是扇形弧上的动点,ABCD是扇形的内接矩形.记
,矩形ABCD的面积为S.
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146295294361600/3146768601931776/STEM/6823d4ea9f2142ba83b4587f34e986e3.png?resizew=142)
(1)求S与a之间的函数关系式;
(2)当
取何值时,S最大?并求出S的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926d1308d5db144e31b4d0211c63ef52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2e157b248dce91edb76974bd5bb3f5.png)
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146295294361600/3146768601931776/STEM/6823d4ea9f2142ba83b4587f34e986e3.png?resizew=142)
(1)求S与a之间的函数关系式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐3】互相垂直且有公共原点的两条数轴构成平面直角坐标系.如果坐标系中两条坐标轴不垂直,那么这样的坐标系称为斜坐标系.如图,设Ox,Oy是平面内相交成
角的两条数轴,
,
分别是与x轴、y轴正方向同向的单位向量.若向量
,则把有序数对
叫做向量在斜坐标系xOy中的坐标.试在该斜坐标系下探究以下问题:
,求
;
(2)已知
,
,求
的值;
(3)已知
,
,
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5253a9a71037d60059b60237824193b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9aa1d34d66a6876aa0566c8fc8b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff1b27f67a2190739f8fe8d71ad22652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b14123852c3e17f0a519282e076797.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b18f32baa8e324b33d707f8d59e0a4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da49dba5e95e0339dbfcf5dde6d01621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29530412521857bc075252387a4a1d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88cd18ab032cef491c7dbed4183e4747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1060c0179e1dfb715453a0071d32b41f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d28aadc13222c88cec6fb8fe7bf199.png)
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