题目内容
cos
cos
-sin
sin
=______．
| π |
| 4 |
| 5π |
| 12 |
| π |
| 4 |
| 5π |
| 12 |
∵cos
cos
-sin
sin
=cos（
+
）=cos
=-
故答案为：-
| π |
| 4 |
| 5π |
| 12 |
| π |
| 4 |
| 5π |
| 12 |
=cos（
| π |
| 4 |
| 5π |
| 12 |
| 2π |
| 3 |
| 1 |
| 2 |
故答案为：-
| 1 |
| 2 |
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相关题目
题目内容
| π |
| 4 |
| 5π |
| 12 |
| π |
| 4 |
| 5π |
| 12 |
| π |
| 4 |
| 5π |
| 12 |
| π |
| 4 |
| 5π |
| 12 |
| π |
| 4 |
| 5π |
| 12 |
| 2π |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |