题目内容
若tan(
+α)=2,则tan2α=______.
| π |
| 4 |
因为tan(
+α)=2,所以tanα=
,tan2α=
=
=
.
故答案为
.
| π |
| 4 |
| 1 |
| 3 |
| 2tanα |
| 1-tan2α |
2×
| ||
1-(
|
| 3 |
| 4 |
故答案为
| 3 |
| 4 |
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相关题目
题目内容
| π |
| 4 |
| π |
| 4 |
| 1 |
| 3 |
| 2tanα |
| 1-tan2α |
2×
| ||
1-(
|
| 3 |
| 4 |
| 3 |
| 4 |