求下列各式的值.
(1)
;
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30653b7d13b9e1fa8e3dd31c2e8327b8.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf08fffe402c1864f29ca6a00eec73b7.png)
21-22高一·全国·课后作业 查看更多[2]
更新时间:2022-02-21 16:25:21
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解答题-问答题
|
容易
(0.94)
解题方法
【推荐1】利用特殊角的三角函数值计算:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f804115867145d0830996a4372702823.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2faa5a5696fbf0f7bc4bf4dde578d3c.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b2cd313332b523b5046fedd4e926aa.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b77f94bddb78e3d8a4b4166c9bb75f9.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f87c5488d28c039d315f97f25ee9976.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d509f5a2e0c587cfbec1795fac7fbed2.png)
您最近一年使用:0次
解答题-计算题
|
容易
(0.94)
【推荐2】利用两角和(差)的余弦公式化简:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2e3da911d205e7f2fdc6c71723c383.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6617af5910cf46922f2f71a1a89d1378.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40937278f0c9fd281dbca8ad14279d7b.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d624a5c3fe6008da916795251791a5.png)
您最近一年使用:0次
解答题-问答题
|
容易
(0.94)
名校
解题方法
【推荐2】已知
是函数
的一个零点.
(1)求实数
的值;
(2)求
单调递减区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4cc0a5cde707611126759d283814e5e.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
您最近一年使用:0次