单元卷 三角恒等变换(基础卷)
一、选择题(本大题共8小题,每小题5分,共40分),在每小题所给出的四个选项中,只有一项是符合题目要求的.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e599d12e43a49b98627a2a3b338194a.png)
A.钝角三角形 | B.直角三角形 | C.锐角三角形 | D.正三角形 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a077ceccea768ed3c664d38d55242fbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06397fbd8b97298fc8bf8f1f42e21d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6834a22cc57e6dc022c74eae7dac76.png)
A.![]() | B.![]() | C.1 | D.![]() |
【知识点】 由条件等式求正、余弦解读 给值求值型问题解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800cb8ea61b27525fb57248268d81aab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557eb194cf0abe382609f8e1325b4197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af9fa4316af53339d53d77cdb922d08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e6639114ec2cfb4b928c9187aa59a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
二、多选题(本大题共4小题,每小题5分,共20分),在每小题所给出的四个选项中,每题有两项或两项以上的正确答案,选对得5分,漏选得3分,不选或错选得0分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb18bf398fcc3f12f1d7dd7b23cc79bd.png)
A.![]() ![]() |
B.![]() |
C.![]() ![]() |
D.![]() ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f57f6745c03eb061bd1caca3efb0164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c6cb0cc172657611e286e7fa669584.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.先将函数![]() ![]() ![]() ![]() |
三、填空题(本大题共4小题,共20分)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25a84e0233ff2c1630fd17be59f9327f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbf5821c4757ea0a319046e2d1abdb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
【知识点】 求二次函数的值域或最值 二倍角的余弦公式解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b3c3e0523d4e14c7b900e162641e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef001eeef468ca21ac0cbb23fd135657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171cd2667d658f2bc2b2043cbbd50f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b9aceea086efe900c1faebf33ae5ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c482294faae6cfa43adf41c495a70adb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74cb54249d05d329e24ec9f8ba28b331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad6c7925d3d2a4dd8126d9fc58d872e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
【知识点】 三角函数图象的综合应用解读
四、解答题(本大题共6小题,共70分.请在答题卡指定区域内作答,解答时应写出文字说明、证明过程或演算步骤)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f383eaff85a457f4fc0cc54154e7c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281805b9dfe2162215dfe6b5ad6d7b03.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284d127f24f3684104911df84ee583ee.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7796ec2b19afa2132fe27609ddf4980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdbf1db7b947d7124d6e76ccab7e80ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af43cf42d6b0bb52b6eba8b65e83b84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a0e41b7d20402d778713c8e0a4c160.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c066a800cd4b7011f1bff3db0efd87dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab10594b7dadac5b712b031bf3f4e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6215ea944592d70b0ba4596ec923649f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d9b3eb057cebe87129e570c9f1e3e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d99652dfa7c6ebdcfd414b27459075b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d18c761af8cb5ff25d5b0eb5aa128ce6.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53496ae2397150370142b5195a1a39c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb27b87a8f0a768c94664131a4fdfe3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45fdc0ab6b028012f6ff6a7789324479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146fc0a63e5c14a8fa46573e60c07ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3611fb6d415a749b33ceac67d18676.png)
![](https://img.xkw.com/dksih/QBM/2020/1/10/2374241964457984/2374807887314944/STEM/3b807e39e46547f4a4dfa6aa30510808.png?resizew=214)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45543cc7952536116ea3b0024eb22f1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7c79293bbe5d6ae08f6ae7c09d4f82f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79d73d3435312ad9933e55bb07b85455.png)