While graphs for cosine and sine functions are similar, those for tangent functions differ significantly from them, sharing only in that they show periodicity and symmetry. Recall \(\tan(x)= ...

width = 600 - margin.left - margin.right, .range([0, 2 * Math.PI]) // X axis goes from 0 to 2pi = all around the circle. If I stop at 1Pi, it will be around a half circle .align(0); // This does ...