题目内容
计算:
+|1+tan60°|=______.
| tan260°-2tan60°+1 |
∵tan60°=
,|1+tan60°|=1+
,
∴原式=
+1+
=
-1+1+
=2
| 3 |
| 3 |
∴原式=
| (tan60°-1)2 |
| 3 |
=
| 3 |
| 3 |
=2
| 3 |
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题目内容
| tan260°-2tan60°+1 |
| 3 |
| 3 |
| (tan60°-1)2 |
| 3 |
| 3 |
| 3 |
| 3 |