计算:(1)(?1)2009+|?32|?(12)?1?sin60° (2)6tan230°-3sin60°-2sin45°
计算:(1)(?1)2009+|?32|?(12)?1?sin60°(2)6tan230°-3sin60°-2sin45°....
计算:(1)(?1)2009+|?32|?(12)?1?sin60° (2)6tan230°-3sin60°-2sin45°.
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(1)原式=-1+
-2-
=-3;
(2)原式=6×(
)2-
×
-2×
=6×
-
-
=2-
| ||
2 |
| ||
2 |
=-3;
(2)原式=6×(
| ||
3 |
3 |
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2 |
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2 |
=6×
1 |
3 |
3 |
2 |
2 |
=2-