问题
解答题
计算：tan230°+2sin60°+tan45°sin30°-tan60°+cos230°．
答案
原式=(
)2+2×3 3
+1×3 2
-1 2
+(3
)23 2
=
+1 3
+3
-1 2
+3 3 4
=
．19 12
搜题请搜索小程序“爱下问搜题”
计算：tan230°+2sin60°+tan45°sin30°-tan60°+cos230°．
原式=(
)2+2×3 3
+1×3 2
-1 2
+(3
)23 2
=
+1 3
+3
-1 2
+3 3 4
=
．19 12
