[sin4α/(1+cos4α)]×[cos2α/(1+cos2α)]×[cosα/(1+cosα)]=?
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[sin4α/(1+cos4α)]×[cos2α/(1+cos2α)]×[cosα/(1+cosα)]=?[sin4α/(1+cos4α)]×[cos2α/(1+cos2α)]×[cosα/(1+co
[sin4α/(1+cos4α)]×[cos2α/(1+cos2α)]×[cosα/(1+cosα)]=?
[sin4α/(1+cos4α)]×[cos2α/(1+cos2α)]×[cosα/(1+cosα)]=?
[sin4α/(1+cos4α)]×[cos2α/(1+cos2α)]×[cosα/(1+cosα)]=?
[sin4α/(1+cos4α)]×[cos2α/(1+cos2α)]×[cosα/(1+cosα)]=[2*2*[2sin(α/2)cos(α/2)]cosα/(2cos2α) ] × cos2α/[2(cosα)^2] × cosα/[2(cosα/2)^2]=tan(α/2)
化简√(1+sin8)的结果是:A、sin4+cos4 B、sin4-cos4 C、cos4-sin4 D、-sin4-cos4( )
证明:cot2α=(1+sin4α+cos4α)/(1+sin4α-cos4α)
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化简(1-cos4α+sin4α)/(1+cos4α+sin4α)
1+cos4α+sin4α/1-cos4α+sin4α.怎么解
怎样化简(1+sin4α+cos4α)÷(1+sin4-cos4α)
化简cos4α/2-sin4α/2
sin4α cos4α等于多少
cos4次方α-sin4次方α=?,
(1+sin4θ-cos4θ)/(1+sin4θ+cos4θ)-(1+sin4θ+cos4θ)/(1+sin4θ-cos4θ)
[sin4α/(1+cos4α)]×[cos2α/(1+cos2α)]×[cosα/(1+cosα)]=?
证明:(1-cos4α)/sin4α*cos2α/(1+cos2α)=tanα
求证:[(1-cos4α)/sin4α]*[cos2α/(1+cos2α)]=tanα
求证cos4α*tan2α-sin4α=2tanα/tan方α-1
sin2α+cos2α=1,sin4α+cos4α为什么等于1
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1sinα+cosα=根号2求sin4α-cos4α
cos4α×tan2α-sin4α=2tanα/(tan^2-1)过程!