题目内容
计算:
(1)|2
-3|-(-
)-2+
(2)
+sin45°cos45°.
(1)|2
| 2 |
| 1 |
| 2 |
| 18 |
(2)
| cos60° |
| 3sin30°-1 |
(1)|2
-3|-(-
)-2+
,
=3-2
-4+3
,
=
-1;
(2)
+sin45°cos45°,
=
+
×
,
=1+
,
=
.
| 2 |
| 1 |
| 2 |
| 18 |
=3-2
| 2 |
| 2 |
=
| 2 |
(2)
| cos60° |
| 3sin30°-1 |
=
| ||
3×
|
| ||
| 2 |
| ||
| 2 |
=1+
| 1 |
| 2 |
=
| 3 |
| 2 |
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