问题
解答题
计算:2sin45°+sin60°-cos30°+tan260°.
答案
2sin45°+sin60°-cos30°+tan260°.
=2×
+2 2
-3 2
+(3 2
)2,3
=
+3.2
故答案为:
+3.2
计算:2sin45°+sin60°-cos30°+tan260°.
2sin45°+sin60°-cos30°+tan260°.
=2×
+2 2
-3 2
+(3 2
)2,3
=
+3.2
故答案为:
+3.2