来自迟瑞娟的问题
【高数求证行列式2cosa1000``````0012cosa100``````00012cosa10```````000012cosa1`````00````】
高数求证行列式
2cosa1000``````00
12cosa100``````00
012cosa10```````00
0012cosa1`````00
```````````````````
00000``````2cosa1
00000``````12cosa
=sin(n+1)a/sina
1回答
2020-05-10 14:23