t(pi/4) = 0.9999999999999956  Math.tan(pi/4) = 0.9999999999999999
0.0     0.0
0.10033467208545024     0.10033467208545055
0.20271003550867187     0.2027100355086725
0.309336249609623       0.3093362496096233
0.4227932187381604      0.4227932187381618
0.5463024898437855      0.5463024898437905
0.6841368083416917      0.6841368083416923
0.8422883804630772      0.8422883804630794
1.029638557050359       1.029638557050364
1.260158217550327       1.260158217550339
1.5574077246548752      1.5574077246549018