计算:cos45°+sin30°sin30°•tan45°+tan260°-2tan60°+1.-数学

题目简介

计算:cos45°+sin30°sin30°•tan45°+tan260°-2tan60°+1.-数学

题目详情

计算:
cos45°+sin30°
sin30°•tan45°
+
tan260°-2tan60°+1
题型:解答题难度:中档来源:不详

答案

原式=
2
2
+class="stub"1
2
class="stub"1
2
×
2
2
+
(tan60°-1)2

=
2
+1
2
2
4
+
3
-1
=
2
+1
2
×class="stub"4
2
+
3
-1
=2+
2
+
3
-1
=1+
2
+
3

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