问题:
计算:
(1)cos60°-tan45°+sin30°
(2) |-
1
2
|-20120-sin30°.
计算:
(1)cos60°-tan45°+sin30°
(2) |-
|-20120-sin30°.
(1)cos60°-tan45°+sin30°
(2) |-
1 |
2 |
参考答案: