题目内容
化简
=______.
(
| ||
| (4cos212°-2)sin12° |
∵
=
=
=-4
故答案为-4
(
| ||
| (4cos212°-2)sin12° |
| ||||
| 2sin12°cos12°cos24° |
2
| ||
|
| 3 |
故答案为-4
| 3 |
练习册系列答案
相关题目