问题
解答题
计算:(1)2sin30°-2cos60°+tan45° (2)-12×
|
答案
(1)2sin30°-2cos60°+tan45°
=2×
-2×1 2
+11 2
=1-1+1=1;
(2)原式=-1×3
+33
+2×3 1 2
=1.
计算:(1)2sin30°-2cos60°+tan45° (2)-12×
|
(1)2sin30°-2cos60°+tan45°
=2×
-2×1 2
+11 2
=1-1+1=1;
(2)原式=-1×3
+33
+2×3 1 2
=1.