X*0.1-210=X-128910
    X*0.1-210=X-126257.05
    tan(0.0385*10)*tan(0.0385*x)=2.56
    tan(0.0385*15)*tan(0.0385*x)=2.56
    tan(0.0385*20)*tan(0.0385*x)=2.56
    tan(0.0385*x)*tan(0.0385*(40.75-x))=2.56
    x-2= 1/2.56
    0.2=（x-15.5）/x
    0.1=（x-15.5）/x
    0.4=（x-15.5）/x
    0.3=（x-15.5）/x
    x^3+7x^2+16x+11＝0
    （tan(0.0385*x)）*（tan(0.0385*(40.75-x))） =1/2.56
    （tan(0.0385*x)）*（tan(0.0385*(40.75-x))） =2.56
    tan(0.0385*x)*tan(0.0385*(40.75-x)) =1/ 2.56
    tan(0.0385*x)*tan(0.0385*(40.75-x)) = 2.56
    tan(0.0385*x)*tan(0.0385*(40.75-x)) = 2.25
    tan(0.0385*x)*tan(0.0385*(40.75-x))=4
    tan(0.0353*21.2)*tan(0.0373*x)-0.79=0
    tan(0.0353*x)*tan(0.0373*(40.75-x))-0.79=0

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