题目内容
已知cosα=-
且α∈(
,π),则tan(α+
=)______.
| 4 |
| 5 |
| π |
| 2 |
| π |
| 4 |
∵已知cosα=-
且α∈(
,π),∴sinα=
,tanα=
=-
.
∴tan(α+
)=
=
=
,
故答案为
.
| 4 |
| 5 |
| π |
| 2 |
| 3 |
| 5 |
| sinα |
| cosα |
| 3 |
| 4 |
∴tan(α+
| π |
| 4 |
| tanα+1 |
| 1-tanα×1 |
-
| ||
1-(-
|
| 1 |
| 7 |
故答案为
| 1 |
| 7 |
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