题目内容
计算
(1+
tan10°)=______．
| sin80° |
| cos50° |
| 3 |
1+
tan10°=1+
=
=
=
，
∴原式=
?
=
?
=2．
故答案为2
| 3 |
| 3 |
| sin10° |
| cos10° |
cos10°+
| ||
| cos10° |
| 2sin(10°+30°) |
| cos10° |
| 2sin40° |
| cos10° |
∴原式=
| sin80° |
| cos50° |
| 2sin40° |
| cos10° |
| cos10° |
| sin40° |
| 2sin40° |
| cos10° |
故答案为2
练习册系列答案
举一反三期末百分冲刺卷系列答案
相关题目
，则
的值是 
，
，则
