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=√3sin2x+cos2x+a =2sin(2x+π/6)+a 请问怎么推的
人气:268 ℃ 时间:2020-06-13 00:48:25
解答
=√3sin2x+cos2x+a
=2(√3/2×sin2x+1/2×cos2x)+a
=2(cosπ/6×sin2x+cos2xsinπ/6)+a
=2sin(2x+π/6)+a
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