题目内容
计算
(1)
×
;
(2)
;
(3)2sin60°-cot60°.
(1)
| 3 |
|
(2)
| ||||
|
(3)2sin60°-cot60°.
(1)原式=
=
=
;
(2)原式=
-
=
-
=
-2;
(3)原式=2×
-
=
-
=
.
3×
|
|
| ||
| 5 |
(2)原式=
| ||
|
| ||
|
|
|
| 2 |
(3)原式=2×
| ||
| 2 |
| ||
| 3 |
| 3 |
| ||
| 3 |
2
| ||
| 3 |
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