${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$

${\tan }^{-1}\left(\frac{x}{y+\sqrt{y^2-x^2}}\right)$

${\tan }^{-1}(\frac{{\displaystyle x}}{{\displaystyle x+\sqrt{y^2-x^2}}}$

${\tan }^{-1}(\sqrt{\left(\frac{y-x}{y+x}\right) )}$

$t{\mathrm{an}}^{-1}(\sqrt{\left(\frac{{\displaystyle y+x}}{{\displaystyle y-x}}\right) )}$

$2{\tan }^{-1}\left(\frac{{\displaystyle x}}{{\displaystyle y+\sqrt{y^2-x^2}}}\right)$