题目内容
计算:
(1)2sin30°+3tan30°+cot45°;
(2)sin45°+tan60°cos30°;
(3)
.
(1)2sin30°+3tan30°+cot45°;
(2)sin45°+tan60°cos30°;
(3)
| 3cot60° |
| 2sin260°-1 |
(1)原式=2×
+3×
+1=2+
;
(2)原式=
+
×
=
;
(2)原式=
=
=2
.
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