问题
解答题
计算:(1)(3
(2) 2cos60°+2sin30°+4tan45° |
答案
(1)原式=(6
-43
)×23
=23
×23
=12;3
(2)原式=2×
+2×1 2
+4×1=6.1 2
计算:(1)(3
(2) 2cos60°+2sin30°+4tan45° |
(1)原式=(6
-43
)×23
=23
×23
=12;3
(2)原式=2×
+2×1 2
+4×1=6.1 2