(0.073/cos (a-5))+(0.01*(1+sina))=0.073
    (0.073/cos (a-5))+(0.01*(1+sina))=0.073
    (0.073/cos (a-5))+(0.01*(1+sina))=0.073
    （0.073/cos（a-5））+0.01*（1+sina）=0.073
    （4-0.75）*0.2796*x=0.019
    （x-2）^2+（（（3x+1）/4）-2）^2=5
    2*x*x*x-x*x-1＝0
    0.75=0.5+(x-49)*0.05-15*0.05
    -2x^2+1.92x+1
    （1+x）^5（4-13x）=4
    （1+x）^5（4-13x）=1
    （1+x）^5（1-3x）=1
     0.073/cos(a-5)+0.01*(1+sina) =0.073
     0.073/cos(a-5)+0.01*(1+sina) =1
    0.073/cos(a-5)+0.01*(1+sina)=1
    0.053/cos(a-5)+0.01*（1+sina ) = 0.053
    0.053/cos(a-5)+0.01*（1+sina ) = 0.053
    0.053/cos(a-5)+0.01*（1+sina ) =0.053
    0.053/cos(a-5)+0.01*（1+sina ) =0.053
    0.053/cos(a-5)+0.01*（1+sina ) =0.053

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