1 . 英国数学家布鲁克泰勒通过研究发现了如下正、余弦公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ab08491d327ffd0cfabccb639e6030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c868fcf317426476af632cac3c028629.png)
其中
,
,
,例如:
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c510ee5e16312f9d01fb3e24cd28d8.png)
在
中,已知
,
弧度,
米,则BC的长约为_________ 米(精确到0.01米)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ab08491d327ffd0cfabccb639e6030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c868fcf317426476af632cac3c028629.png)
其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b80c875ad8fafc41d5c82baf23bb5e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ef8db418ece9675eecd645717806ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306da3f46a4e2a78bb84727e26b5ea9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c510ee5e16312f9d01fb3e24cd28d8.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddda8bee262f17d51ee3d70cf63d6b0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1cf0ae3ce752f851cceca482cbec31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71807a35b3170fce28ee6edf4c00d083.png)
您最近一年使用:0次
2 . 对任一实数序列
,定义序列
,它的第
项为
.假定序列
的所有项都为1,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366b7d2c4916ea8913f49587388f7e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91ba069103b2b38a451c8d33edd53fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fcde3a21ad686b1befcaefea2b6f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3cac3a8afcdd15c36f610247d50439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bc11d05aad76672e30e17311d204d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac326f9f4ad78d0053c113f823ea6d60.png)
A.1000 | B.2000 | C.2003 | D.4006 |
您最近一年使用:0次
2021-02-27更新
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1452次组卷
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6卷引用:湖南省长沙市长郡中学2021-2022学年高二上学期期中数学试题
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