问题
解答题
计算下列各题 (1)2x
(2)cos30°+sin45°-tan30°•tan60 (3)
(4)
|
答案
(1)原式=6x
+4x3x 3x
=10x
;3x
(2)原式=
+3 2
-2 2
•3 3 3
=
+3 2
-1;2 2
(3)原式=3
-53
+3
+23 3
=
;3
(4)原式=3
+2×3
+1-21 2
=3
+1+1-23
=3
.3
计算下列各题 (1)2x
(2)cos30°+sin45°-tan30°•tan60 (3)
(4)
|
(1)原式=6x
+4x3x 3x
=10x
;3x
(2)原式=
+3 2
-2 2
•3 3 3
=
+3 2
-1;2 2
(3)原式=3
-53
+3
+23 3
=
;3
(4)原式=3
+2×3
+1-21 2
=3
+1+1-23
=3
.3