# 6*atan(x) # x y1 -20.0 -9.125027586437723 -19.0 -9.109279591103729 -18.0 -9.091786929295079 -17.0 -9.072243024475044 -16.0 -9.050265100793636 -15.0 -9.025368978114436 -14.0 -8.996933172057638 -13.0 -8.964146613150712 -12.0 -8.925930569438732 -11.0 -8.880818637564909 -10.0 -8.826766045822408 -9.0 -8.760834633726006 -8.0 -8.678647993488811 -7.0 -8.573395633144397 -6.0 -8.43388589628162 -5.0 -8.240404601670095 -4.0 -7.954905982008196 -3.0 -7.494274634389527 -2.0 -6.6428923067645425 -1.0 -4.71238898038469 0.0 0.0 1.0 4.71238898038469 2.0 6.6428923067645425 3.0 7.494274634389527 4.0 7.954905982008196 5.0000000000000036 8.240404601670095 6.0 8.43388589628162 7.0 8.573395633144397 8.0 8.678647993488811 9.0 8.760834633726006 10.0 8.826766045822408 10.999999999999996 8.880818637564909 12.0 8.925930569438732 13.0 8.964146613150712 14.0 8.996933172057638 15.0 9.025368978114436 16.0 9.050265100793636 17.0 9.072243024475044 18.0 9.091786929295079 19.0 9.109279591103729