Mathematics
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    arctan(0.4078)+arctan(0.4078*5)
    arctan(0.4078)+arctan(0.4078*5)
    arcsin1
    sin30
    sin45
    sin31
    0.50×10^(-3)×1.0×1.83×1700×(1385-70)
    arcsin0.19948
    arcsin0.19948
    sin32.50
    arccos0.84337
    arccos0.84337
    atan0.6823=
    375cos20
    arcsin0.122
    sin32
    arccos0.8433
    arccos0.8433
    1/0.625
    1/0.625

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