问题
解答题
计算 (1)
(2)
(3)2sin60°-cot60°. |
答案
(1)原式=
=3× 2 75
=2 25
;2 5
(2)原式=
-6 3
=12 3
-6 3
=12 3
-2;2
(3)原式=2×
-3 2
=3 3
-3
=3 3
.2 3 3
计算 (1)
(2)
(3)2sin60°-cot60°. |
(1)原式=
=3× 2 75
=2 25
;2 5
(2)原式=
-6 3
=12 3
-6 3
=12 3
-2;2
(3)原式=2×
-3 2
=3 3
-3
=3 3
.2 3 3