问题
解答题
计算: (1)2
(2)tan60°+2sin45°-2cos30° |
答案
(1)原式=2×2
-32
+2
,2 2
=4
-32
+2
,2 2
=(4-3+
)1 2
,2
=3 2
;2
(2)原式=
+2×3
-2×2 2
,3 2
=
+3
-2
,3
=
.2
计算: (1)2
(2)tan60°+2sin45°-2cos30° |
(1)原式=2×2
-32
+2
,2 2
=4
-32
+2
,2 2
=(4-3+
)1 2
,2
=3 2
;2
(2)原式=
+2×3
-2×2 2
,3 2
=
+3
-2
,3
=
.2