怎样化简函数 cosπ/4cosπ/3-sinπ/4sinπ/3
cosπ/4cosπ/3-sinπ/4sinπ/3
人气:337 ℃ 时间:2020-07-05 19:13:09
解答
cosπ/4cosπ/3-sinπ/4sinπ/3
=cos45°cos60°-sin45°sin60°
=(√2/2)*(1/2)- (√2/2)*(√3/2)
=(√2-√6)/4
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