问题
解答题
计算:2-1-(π-2014)0+cos245°+tan30°•sin60°.
答案
原式=
-1+(1 2
)2+2 2
•3 3 3 2
=
-1+1 2
+1 2 1 2
=
.1 2
计算:2-1-(π-2014)0+cos245°+tan30°•sin60°.
原式=
-1+(1 2
)2+2 2
•3 3 3 2
=
-1+1 2
+1 2 1 2
=
.1 2