| 帖子标题 | 发布时间 | 回复/人气 |
| 为什么重心把三角形面积相等的三部分 | 2012-04-04 15:11 | 1/371 |
| ....... | 2012-03-25 15:15 | 1/236 |
| 设向量AB， | 2012-03-25 12:31 | 1/308 |
| ... | 2012-03-11 16:09 | 2/203 |
| 11 | 2012-02-25 23:25 | 1/187 |
| 10 | 2012-02-25 23:24 | 2/188 |
| 9 | 2012-02-25 23:23 | 2/292 |
| 8 | 2012-02-25 23:19 | 1/221 |
| 7 | 2012-02-25 23:15 | 1/142 |
| 6 | 2012-02-25 23:14 | 1/145 |
| 5 | 2012-02-25 23:12 | 1/127 |
| 4 | 2012-02-25 23:08 | 1/240 |
| 333 | 2012-02-25 23:06 | 1/160 |
| 2 | 2012-02-25 22:58 | 1/133 |
| wen.. | 2012-02-25 22:55 | 1/123 |
| a a | 2012-02-19 15:00 | 2/255 |
| ti aa | 2012-02-19 14:53 | 1/160 |
| ti | 2012-02-19 14:47 | 1/155 |
| 如果tanα=√3,π<α小于3π/2,那么cosα-sinα的值是 | 2012-02-11 15:43 | 1/123 |
| 若sinα=3/5,α∈(0,π)则tanα= | 2012-02-11 15:38 | 1/139 |
