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y=cos^2x+根号3sinxcosx+1化成y=Asin(ωx+ψ)+b
人气:490 ℃ 时间:2020-05-13 17:41:23
解答
y=cos²x+√3sinxcosx+1
=(1+cos2x)/2+√3sinxcosx+1
=(1/2)cos2x+(√3/2)sin2x+3/2
=sin(2x+π/6)+3/2.
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