5-cos20°3-cos220°=______.-数学

题目简介

5-cos20°3-cos220°=______.-数学

题目详情

5-cos20°
3-cos220°
=______.
题型:填空题难度:中档来源:不详

答案

class="stub"5-cos20°
3-cos220°

=class="stub"5-cos20°
3-class="stub"1+cos20°
2

=class="stub"5-cos20°
class="stub"1
2
(5-cos20°)

=2
故答案为:2

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