Online Algebra Calculator
Many of users do not use powerful Maxima computer algebra system for systematic work, but for ad hoc algebraic calculations – equations, functions, matrixes, etc. only. To do this job, it is not useful to download the whole application from a web site.
Function: atan2 (<y>, <x>) - yields the value of atan(<y>/<x>) in the interval -%pi to %pi.
![Atan2 Example plot2d(atan2(-97.52,x),[x,-159,158]);](http://maxima-online.org//plot.html?g=p524683190.png&t=img&db=r-1222554614)
(%o1) true (%i2)