cos14.1
    cos14.5
    cos13
    cos12.9
    cos12.2
    cos12.5
    cos12.72
    cos12.788
    cos12.798
    cos12.812
    cos12.81
    cos12.8
    cos12.7325
    cos0.9754
    3×2^2×2^2
    acos0.81284153
    cos0.81284153
    cos13
    99/1.111
    -sin（π/4 ）

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