# i(°)        d_exact     d_approchee  Cx          Cz         Cz/Cx          Cm
  -2.5000      0.3060      0.1727      0.0417     -0.2807     -6.7298      0.0158
  -2.0000     -0.0967     -0.1289      0.0367     -0.0573     -1.5622     -0.0203
  -1.5000     -2.4941     -2.8961      0.0372     -0.0069     -0.1855     -0.0216
  -1.0000      0.7658      0.7423      0.0380      0.0441      1.1611     -0.0224
  -0.5000      0.4951      0.4804      0.0389      0.0942      2.4197     -0.0230
   0.0000      0.4128      0.4023      0.0401      0.1425      3.5572     -0.0232
   0.5000      0.3754      0.3666      0.0416      0.1862      4.4717     -0.0234
   1.5000      0.3899      0.2904      0.0448      0.5373     11.9987     -0.0753
   2.0000      0.3788      0.2826      0.0453      0.6664     14.7173     -0.0860
   2.5000      0.3724      0.2826      0.0515      0.6657     12.9388     -0.0817
   3.0000      0.3676      0.2827      0.0583      0.6631     11.3661     -0.0782
   3.5000      0.3653      0.2839      0.0669      0.6408      9.5842     -0.0742
   4.0000      0.3655      0.2852      0.0759      0.6170      8.1259     -0.0717
   4.5000      0.3659      0.2858      0.0843      0.6062      7.1867     -0.0708
   5.0000      0.3660      0.2857      0.0926      0.6074      6.5601     -0.0711