i x exact16dec cmath_atan atan_13.70 atan_16.06 error_13.70 error_16.08 0 0.05 0.0499583957219427 0.0499583957219428 0.0499583957219434 0.0499583957219428 6.453e-16 6.939e-18 1 0.10 0.0996686524911620 0.0996686524911620 0.0996686524911621 0.0996686524911620 8.327e-17 0 2 0.15 0.1488899476094972 0.1488899476094973 0.1488899476094955 0.1488899476094973 -1.804e-15 0 3 0.20 0.1973955598498807 0.1973955598498808 0.1973955598498836 0.1973955598498807 2.776e-15 -2.776e-17 4 0.25 0.2449786631268641 0.2449786631268641 0.2449786631268659 0.2449786631268642 1.721e-15 2.776e-17 5 0.30 0.2914567944778670 0.2914567944778671 0.2914567944778712 0.2914567944778670 4.108e-15 -1.11e-16 6 0.35 0.3366748193867271 0.3366748193867272 0.3366748193867234 0.3366748193867271 -3.775e-15 -1.11e-16 7 0.40 0.3805063771123648 0.3805063771123648 0.3805063771123672 0.3805063771123648 2.331e-15 -5.551e-17 8 0.45 0.4228539261329407 0.4228539261329406 0.4228539261329406 0.4228539261329406 0 0 9 0.50 0.4636476090008061 0.4636476090008061 0.4636476090008049 0.4636476090008060 -1.166e-15 -5.551e-17 10 0.55 0.5028432109278608 0.5028432109278608 0.5028432109278610 0.5028432109278608 2.22e-16 0 11 0.60 0.5404195002705841 0.5404195002705842 0.5404195002705838 0.5404195002705841 -3.331e-16 -1.11e-16 12 0.65 0.5763752205911836 0.5763752205911837 0.5763752205911844 0.5763752205911836 6.661e-16 -1.11e-16 13 0.70 0.6107259643892086 0.6107259643892087 0.6107259643892097 0.6107259643892087 9.992e-16 0 14 0.75 0.6435011087932843 0.6435011087932845 0.6435011087932825 0.6435011087932845 -1.998e-15 0 15 0.80 0.6747409422235526 0.6747409422235527 0.6747409422235513 0.6747409422235527 -1.443e-15 0 16 0.85 0.7044940642422177 0.7044940642422178 0.7044940642422213 0.7044940642422178 3.442e-15 0 17 0.90 0.7328151017865066 0.7328151017865068 0.7328151017865063 0.7328151017865068 -4.441e-16 0 18 0.95 0.7597627548757708 0.7597627548757709 0.7597627548757679 0.7597627548757711 -2.998e-15 1.11e-16 19 1.00 0.7853981633974483 0.7853981633974484 0.7853981633974536 0.7853981633974484 5.218e-15 0 20 1.05 0.8097835725701668 0.8097835725701670 0.8097835725701694 0.8097835725701669 2.442e-15 -1.11e-16 21 1.10 0.8329812666744317 0.8329812666744318 0.8329812666744338 0.8329812666744318 1.998e-15 0 22 1.15 0.8550527371260165 0.8550527371260167 0.8550527371260130 0.8550527371260166 -3.664e-15 -1.11e-16 23 1.20 0.8760580505981934 0.8760580505981936 0.8760580505981915 0.8760580505981935 -2.109e-15 -1.11e-16 24 1.25 0.8960553845713439 0.8960553845713441 0.8960553845713456 0.8960553845713441 1.443e-15 0 25 1.30 0.9151007005533603 0.9151007005533606 0.9151007005533632 0.9151007005533606 2.665e-15 0 26 1.35 0.9332475286562038 0.9332475286562041 0.9332475286562054 0.9332475286562040 1.332e-15 -1.11e-16 27 1.40 0.9505468408120751 0.9505468408120753 0.9505468408120750 0.9505468408120753 -3.331e-16 0 28 1.45 0.9670469933974603 0.9670469933974605 0.9670469933974590 0.9670469933974604 -1.443e-15 -1.11e-16 29 1.50 0.9827937232473291 0.9827937232473293 0.9827937232473279 0.9827937232473292 -1.332e-15 -1.11e-16 30 1.55 0.9978301839061904 0.9978301839061907 0.9978301839061900 0.9978301839061907 -6.661e-16 0 31 1.60 1.0121970114513341 1.0121970114513343 1.0121970114513343 1.0121970114513343 0 0 32 1.65 1.0259324113433530 1.0259324113433532 1.0259324113433532 1.0259324113433532 0 0 33 1.70 1.0390722595360911 1.0390722595360913 1.0390722595360913 1.0390722595360913 0 0 34 1.75 1.0516502125483735 1.0516502125483740 1.0516502125483738 1.0516502125483740 -2.22e-16 0 35 1.80 1.0636978224025595 1.0636978224025599 1.0636978224025597 1.0636978224025597 -2.22e-16 -2.22e-16 36 1.85 1.0752446533090680 1.0752446533090683 1.0752446533090680 1.0752446533090683 -2.22e-16 0 37 1.90 1.0863183977578734 1.0863183977578736 1.0863183977578736 1.0863183977578736 0 0 38 1.95 1.0969449903001363 1.0969449903001365 1.0969449903001371 1.0969449903001365 6.661e-16 0 39 2.00 1.1071487177940904 1.1071487177940906 1.1071487177940917 1.1071487177940906 1.11e-15 0