1 . (1)已知角
的终边过点
,且
,求
的值;
(2)已知
,
,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb6a61ad1ff2a183d8ce3a215b908df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19aec1e0a549299a50e0140a362197fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7b915277169254e670ea51b693b9fc.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6b1670b2b446ace5bc12d7385b8e78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9e3b2b77bc9b54f3ae0b332e705c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6659ee24daa8fd4283e1077def819937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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2022-06-17更新
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622次组卷
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3卷引用:陕西省西安市雁塔区第二中学、渭北中学2021-2022学年高二下学期期末联考文科数学试题
2 . 已知cos
=
,cos(
-β)=
,且0<β<
<
,求β的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1887ee1e782c5542b25803a081449106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ccfc3c8eefacb05a8f019933954c8c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de12bbd5097debc83d6a46364589748.png)
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2018-08-28更新
|
379次组卷
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7卷引用:陕西省黄陵中学2017-2018学年高二(重点班)上学期开学考试数学试题
陕西省黄陵中学2017-2018学年高二(重点班)上学期开学考试数学试题高中数学人教A版必修4 第三章 三角恒等变换 3.1.1 两角差的余弦公式河南省项城三高2017-2018学年高一下学期第二次段考数学(B卷)试题(已下线)8.2.1两角和与差的余弦导学案(1)(已下线)5.5+三角恒等变换-2020-2021学年新教材导学导练高中数学必修第一册(人教A版)(已下线)专题5.5 三角恒等变换-《讲亮点》2021-2022学年高一数学新教材同步配套讲练(人教A版2019必修第一册)(已下线)FHsx1225yl056
10-11高三·陕西·阶段练习
名校
3 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66e81ea19780ebbe65dd1be49046305.png)
为偶函数, 且
.
(Ⅰ)求
的值;
(Ⅱ)若
为三角形
的一个内角,求满足
的
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66e81ea19780ebbe65dd1be49046305.png)
为偶函数, 且
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571211524784128/1571211530436608/STEM/7b7a8d9993bb4740b744707559f2f90e.png)
(Ⅰ)求
![](https://img.xkw.com/dksih/QBM/2013/5/10/1571211524784128/1571211530436608/STEM/3545ea2b8b384d289271350272be4b2e.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907e4ba6d5f2eea68442def1911957fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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