sin(3.6096/4)＾2
    sin4.5545
    sin（4.5545/4）
    sin（4.5545/2）
    （sin1.138625)＾2
    40 + 10*log(40^2 + 5)
    （sin0.93775）^2=
    cos1.8755=
    -cos1.8755=
    cos3.7510=
    sin3.7510=
    1.2*167567*.1*(1/2170+(0.45-0.0429)/(0.0429*780))
    1.2*167567*.1*(1/2170+2*(0.45-0.0429)/(0.0429*780))
    1.2*0.2*3.14*0.1*0.1*1000*(1/2170+0.2/（900*0.003）)*1000
    1.2*0.2*3.14*0.0625*0.0625*1000*(1/2170+0.125/（900*0.003）)*1000
    1.2*0.2*3.14*0.0625*0.0625*2500*(1/2170+0.125/（900*0.003）)
    1.2*0.2*3.14*0.175*0.175*1066*(1/2170+0.35/（900*0.005）)*1000
    1.2*0.2*3.14*0.175*0.175*1066*(1/2170+0.35/900/0.005)*1000
    2*（2^（1/2））-（2*（2^（1/2））*5）/12
    －7减2

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