6sin^2α-sinαcosα-cos^2α=0,求cosα+sinα的值
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6sin^2α-sinαcosα-cos^2α=0,求cosα+sinα的值
6sin^2α-sinαcosα-cos^2α=0,求cosα+sinα的值
6sin^2α-sinαcosα-cos^2α=0,求cosα+sinα的值
本方程联立Sin^2+Cos^2=1可求得正玄与余弦分别为:
{{x -> -(1/Sqrt[5]),y -> -(2/Sqrt[5])},{x -> 1/Sqrt[5],
y -> 2/Sqrt[5]},{x -> -(1/Sqrt[10]),
y -> 3/Sqrt[10]},{x -> 1/Sqrt[10],y -> -(3/Sqrt[10])}}
正玄与余弦之和为{-(3/Sqrt[5]),3/Sqrt[5],Sqrt[2/5],-Sqrt[(2/5)]}
sinα-2cosα分之sinα+cosα
3sinα=2cosα,则 cosα-sinα/cosα+sinα/ cos3sinα=2cosα,则cosα-sinα/cosα+sinα/cosα+sinα/cosα-sinα
sin(α+β)-2cosαsinβ/2cosαcosβ-cos(α+β)
6sin^2α-sinαcosα-cos^2α=0,求cosα+sinα的值
sin(α+β)-2sinαcosβ/2sinαsinβ+cos(α+β)
(1-cos-sin)(1-sin+cos)/sin^2α-sinα
化简sinα^6+cosα^6+3sinα^2cosα^2的结果是
化简:sin^6α+cos^6α+3sin^2α*cos^2α=?
2(sin^6 α +cos^6α)-3(sin^4a+cos^4α)mingbaidian
2(sin^6 α +cos^6α)-3(sin^4a+cos^4α)
利用和差角公式化简 (2)sin(π/3+α)+sin(π/3-α)(2)sin(π/3+α)+sin(π/3-α)(3)cos(π/4+α)-cos(π/4-α)(4)cos(60°+α)+cos(60°-α)(5)sin(α-β)cosβ+cos(α-β)sinβ(6)cos(α+β)cosβ+sin(α+β)sinβ
sinα=-2cosα,求sin^2α-3sinαcosα+1
求证:sinα/(1+cosα)+(1+cosα)/sinα=2/sinα
若sinα+sin^2α=1,则cos^2α+cos^6α+cos^8α=?
sin α+sin^2α=1,则cos^2 α+cos^6 α+cos^8α=多少?,
若sinα+sin^2α=1,则cos^2α+cos^4α+cos^6α=?
sinαsinα+cosαcosα=
sin αcosβ+cos α sin β等于?