题目内容
化简与计算:
(1)
+3
-
+
(2)化简:
sin60°-(cos45°-1)0-tan30°-cos30°.
(1)
| 8 |
|
| 1 | ||
|
| ||
| 2 |
(2)化简:
| 3 |
(1)
+3
-
+
=2
+
-
+
=
+
.
(2)
sin60°-(cos45°-1)0-tan30°cos30°
=
×
-1-
×
=
-1-
=0.
| 8 |
|
| 1 | ||
|
| ||
| 2 |
=2
| 2 |
| 3 |
| ||
| 2 |
| ||
| 2 |
=
3
| ||
| 2 |
3
| ||
| 2 |
(2)
| 3 |
=
| ||
| 2 |
| 3 |
| ||
| 3 |
| ||
| 2 |
=
| 3 |
| 2 |
| 1 |
| 2 |
=0.
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