24-25高一上·全国·课后作业
1 . 求下列函数值:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
.
利用已学过的三角函数公式,你还能求出哪些角的三角函数值?请举3个例子.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b01d2bf1b175c7675c2992e152d866.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4044c638b71133bf8cc9e0663b7154.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b07244f0512ab0e629823a5859b3c46.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccea759e9d7079f3f4ebf5c65ba75fbe.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497fab1727384e3bbf3544e8af004333.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e528a13e9764255b340732ffb3a87a3d.png)
利用已学过的三角函数公式,你还能求出哪些角的三角函数值?请举3个例子.
您最近一年使用:0次
24-25高一上·全国·课后作业
2 . 画出从公式
到半角的余弦公式的知识结构框图.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5bcf44b6a1dd4daf8eca077ff72d4c.png)
您最近一年使用:0次
解题方法
3 . 求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64ede7fcfaed6aad0dbf51832ecf0a10.png)
您最近一年使用:0次
4 . 请用本节学过的公式验证和推导下列诱导公式:
(1)
,
;
(2)
______;
(3)
______.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e86013ece3955d2940f17e649a28d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857ad304c9845431a3c734f41fc198d0.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effe22cdecfbb3b7bcab85c9d4c09652.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200b0a141ee787fb4c37a49f69394cc8.png)
您最近一年使用:0次
2023-10-09更新
|
70次组卷
|
3卷引用:2.1 两角和与差的余弦公式及其应用
解题方法
5 . 已知
,
,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f9105ef2e1eab7fc2b531acb270950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a3fd3a067dce1354bc941df061508a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d12d8717ca07aa83f79e38b38fdb46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52847a80db1c6d3372d4846672ed4156.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3884b343d76a26b4b85b48987d7064.png)
您最近一年使用:0次
2023-10-09更新
|
160次组卷
|
4卷引用:2.1 两角和与差的余弦公式及其应用
6 . 已知
,
,
,
分别是第二、第三象限角,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32eb02421d867d06df9628e7a4850f7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598fec40060a1b20eb56ba3b969a9257.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/bbb006ea697b63a914eb487073f0abe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673f7e66c2a252da4c77c70d90c8cec.png)
您最近一年使用:0次
2023-10-09更新
|
129次组卷
|
3卷引用:2.1 两角和与差的余弦公式及其应用
解题方法
7 . 若
,且
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06f37bd322af6e273ceb66bac49a716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/847e338be81ea9abdacc6d66cc0959f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
8 . 已知
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9da6f152a33ef475161c9e396647225.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7dc4a8ca221732931bb72442a15df14.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4306b944f46c6f8820960a57059a393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a3fd3a067dce1354bc941df061508a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c711885ba609af63b3f02b7074914ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9be2e0a0816bc26d430622d24909ef97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9da6f152a33ef475161c9e396647225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7dc4a8ca221732931bb72442a15df14.png)
您最近一年使用:0次
解题方法
9 . 已知
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e86cacc7c6170045ed757879daa1f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d39dd37b47e347cf827b7a7898cb93b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
10 . 已知
,
,
,
,则
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a077ceccea768ed3c664d38d55242fbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d590efabf20f5e49b138aceb068a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6359b5061b323f92c4c54e3fcdd783bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b30bfb2bda6d94244582c0fb8d65424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6834a22cc57e6dc022c74eae7dac76.png)
您最近一年使用:0次