题目内容
计算(1+tan60°-sin60°)(1-cot30°+cos30°).
把tan60°=
,sin60°=
,cot30°=
,cos30°=
,
代入原式得:原式=(1+tan60°-sin60°)(1-cot30°+cos30°)
=(1+
-
)(1-
+
)
=(1+
)(1-
)
=1-(
)2=1-
=
.
| 3 |
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| 2 |
| 3 |
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| 2 |
代入原式得:原式=(1+tan60°-sin60°)(1-cot30°+cos30°)
=(1+
| 3 |
| ||
| 2 |
| 3 |
| ||
| 2 |
=(1+
| ||
| 2 |
| ||
| 2 |
=1-(
| ||
| 2 |
| 3 |
| 4 |
=
| 1 |
| 4 |
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