题目内容
已知sinα=
,其中α∈(0,
),则cos(α+
)=______.
| 1 |
| 2 |
| π |
| 2 |
| π |
| 6 |
∵α∈(0,
),sinα=
∴α=
∴cos(α+
)=cos
=
故答案为:
| π |
| 2 |
| 1 |
| 2 |
∴α=
| π |
| 6 |
∴cos(α+
| π |
| 6 |
| π |
| 3 |
| 1 |
| 2 |
故答案为:
| 1 |
| 2 |
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题目内容
| 1 |
| 2 |
| π |
| 2 |
| π |
| 6 |
| π |
| 2 |
| 1 |
| 2 |
| π |
| 6 |
| π |
| 6 |
| π |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |