Mathematics
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current location:Mathematical operation > History of Mathematical Computation
    arccos(-6.48/8.64)
    arccos(6.48/8.64)
    arctan(3/2)
    16000*8000
    4+9+14+19+24+29+34+39+.....+104
    1/0
    arctan(1/2)
     sqrt(2)+sqrt(2)/4*(1.2-1)
     sqrt(2)+sqrt(2)/4*(1.1-1)
     sqrt(2)+sqrt(2)/4*(0.9-1)
    abs(-3)
    (1+√3/3)/(1-√3/3)
    (89*2+90*2+91*2+79*2+88*1+89*2+91*1.5+90*1.5)/(2+2+2+2+1+2+1.5+1.5)
    arccos(4.5/15)
    arctan(4/3)
    arctan4/3
    (4.5^2+3.5^2)^(1/2)
    (0.45^2+0.35^2)^(1/2)
    tan20*0.75
    sin20*0.75

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