# i(°)        d_exact     d_approchee  Cx          Cz         Cz/Cx          Cm
  -2.5000      0.2378      0.1708      0.0262     -0.2118     -8.0963     -0.0026
  -1.0000      0.4366      0.3691      0.0218      0.1408      6.4676     -0.0262
  -0.5000      0.3938      0.3244      0.0221      0.2255     10.2268     -0.0324
   0.0000      0.3789      0.3019      0.0222      0.3235     14.5590     -0.0417
   0.5000      0.3734      0.2889      0.0225      0.4310     19.1726     -0.0532
   1.0000      0.3669      0.2822      0.0231      0.5217     22.5649     -0.0610
   1.5000      0.3624      0.2775      0.0238      0.6100     25.6087     -0.0686
   2.0000      0.3651      0.2726      0.0262      0.7409     28.2571     -0.0853
   2.5000      0.3613      0.2704      0.0283      0.8220     29.0973     -0.0915
   3.0000      0.3540      0.2693      0.0302      0.8711     28.8062     -0.0906
   3.5000      0.3471      0.2683      0.0325      0.9165     28.2261     -0.0890
   4.0000      0.3407      0.2675      0.0351      0.9580     27.3246     -0.0869
   4.5000      0.3345      0.2669      0.0381      0.9950     26.1498     -0.0841
   5.0000      0.3285      0.2663      0.0415      1.0268     24.7183     -0.0806