题目内容
计算或化简:
(1)
cos30°+
sin45°;
(2)
•tan 30°.
(1)
| 3 |
| 2 |
(2)
| tan45°-cos60° |
| sin60° |
(1)原式=
×
+
×
=
+1
=
;
(2)原式=
×
=
×
=
.
| 3 |
| ||
| 2 |
| 2 |
| ||
| 2 |
=
| 3 |
| 2 |
=
| 5 |
| 2 |
(2)原式=
1-
| ||||
|
| ||
| 3 |
=
| ||
| 3 |
| ||
| 3 |
=
| 1 |
| 3 |
练习册系列答案
相关题目