计算:sin 2 30°+2sin60°+tan45°-tan60°+cos 2 30°

计算:sin 2 30°+2sin60°+tan45°-tan60°+cos 2 30°.
2024-12-04 18:43:02
推荐回答(1个)
回答(1):

原式=(
1
2
2 +2×
3
2
+1-
3
+(
3
2
2
=
1
4
+
3
+1-
3
+
3
4

=1+1
=2.