arctan2(x,y): Proportional accurate arctangent-graph plotted with cubic bezier-curves. The arctan2(x,y)-, sometimes atan2(y,x)-function is especially implemented in programming languages. It yields the angle from the x-axis to any point (x,y). Quadrants in blue. Plot with |x|≫0. Red bullets and circles symbolize removable discontinuities at y=0 and at the poles of the tangent at x=0. 3 special angles π/2=~(±0;+1), -π/2=~(±0,-1), ±π=~(-1;±0) marked at their exit and entry.
Own workThis file was derived from: Arctangent2.svg
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