This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Atan. diagram of function atan in GNU Maxima Own Adam majewski Maxima source code plotd atan plotformat gnuplot Adam majewski October UTC Arc tangent function Gnuplot diagrams
Page 2023 Free-images.com. All images are Public Domain