| 1 |
| tanx |
| 3 |
| 2 |
| tan2x−1 |
| tanx |
| 3 |
| 2 |
| 2tanx |
| 1−tan2x |
| 4 |
| 3 |
所以tan2x=−
| 4 |
| 3 |
故答案为：−
| 4 |
| 3 |
已知tanx−1/tanx＝3/2，则tan2x=_．
已知tanx−
＝
，则tan2x=______．
| 1 |
| tanx |
| 3 |
| 2 |
数学人气：728 ℃时间：2020-04-01 22:00:34
优质解答
已知tanx−
＝
，所以
＝
即
＝−
所以tan2x=−
故答案为：−
．
所以tan2x=−
故答案为：−
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