题目内容
化简下列各题
(1)
sin60°-
cos45°+
(2)
+
-
.
(1)
| 3 |
| 2 |
| 3 | 8 |
(2)
| 1 |
| 3 |
| 32 |
| 1 |
| 2 |
| 8 |
| 1 |
| 5 |
| 50 |
(1)原式=
×
-
×
+2=
-1+2=
;
(2)原式=
×4
+
×2
-
×5
=
+
-
=
.
| 3 |
| ||
| 2 |
| 2 |
| ||
| 2 |
| 3 |
| 2 |
| 5 |
| 2 |
(2)原式=
| 1 |
| 3 |
| 2 |
| 1 |
| 2 |
| 2 |
| 1 |
| 5 |
| 2 |
4
| ||
| 3 |
| 2 |
| 2 |
4
| ||
| 3 |
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