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::::::<math> \arctan z \, = \, \int_0^z \frac{ \mathrm{d} t }{ 1 + t^2 } \, = \, \frac{ \pi }{ 2 } - \arccot z \,.</math>
:::::"The path of integration must not cross ... the imaginary axis in the case of 4.4.3 except possibly inside the unit circle." [[User:JRSpriggs|JRSpriggs]] ([[User talk:JRSpriggs|talk]]) 14:49, 13 April 2016 (UTC)
So wait, this is still left ambiguous. Have we all collectively decided to uphold the standards from that book? Or should we uphold the standards from the NIST website? [[User:Math Machine 4|Math Machine 4]] ([[User talk:Math Machine 4|talk]]) 19:35, 15 December 2020 (UTC)
== Radian… and [[:Category:Dimensionless numbers|category]] ==
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