## Given y=atan(x)/x, how can I get “x” for a given value of “y”?

I have a simple C++ equation that I’m using to perform lens distortion correction. $$y=\frac{\arctan(x)}{x}$$ where $x$ is in radians between 0.0 and 1.0. I’m trying to come up with the inverse of this equation [get $x$ given $y$] but I’ve been unsuccessful. I got this far before my flabby math skills were exhausted: $$xy … Read more