化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/05 22:58:21
化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
cos(27°+α)cos(33°-α)-sin(27°+α)sin(33°-α)
=cos[(27°+α)+(33°-α)]
=cos60°
=1/2
化简3.cos(27+α)cos(33-α)-sin(27+α)sin(33-α)化简cos(27+α)cos(33-α)-sin(27+α)sin(33-α)
化简:cos(60-α)-cos(60+α)
化简:cos(-π-α)
cos^2α+cos^2(α+π/3)-cosαcos(α+π/3)化简
cos
【2cos³α-cos²α+cosα-2】/2cos²α+cosα+2化简
cosα
化简:sin²(α+π)cos(-α+π)/tan(α+π)tan(α+2π)cos²(-α-π)1.cos(27°+α)cos(33°-α)-sin(27°+α)sin(33°-α) 2.sin²(α+π)cos(-α+π)/tan(α+π)tan(α+2π)cos²(-α-π)
求证:|cosα+cosβ|
化简(sin²α/1-cosα)-cosα
化简√cos²α-2cosα+1
cos(α+β)cos(α-β)+sin²β 化简
化简:cos2α-cos2β/cosα-cosβ
化简cos(α+β)+cos(α-β)=?
cos²α+cos²(120°-α)+cosαcos(120°-α)化简cos²α+cos²(120°-α)+cosαcos(120°-α)
sinα+cosα 化简
2sinα*cosα*cos(2π-α)+cos(π+2α)*cosα*tanα化简!
cos(α+5π/12)cos(α+π/6)+cos(π/12-α)cos(π/3-α) 化简