How to draw a tangent line to an arbitrary `\addplot`
23629
Aligning tangents of graphs
49559
How to draw grid lines on top of a plot?
46496
What is the fastest way to add vertices to a curve at a specific point?
138179
How do I draw a scatterplot with a function plot?
110844
Plotting a function defined with \pgfmathdeclarefunction
51259
Draw additional parallel paths in TikZ
35174
Plotting implicitly-defined space curves
79326
How can I fill under a function in a plot just to right of a specified vertical line?
72729
How to draw arbitrary closed surface with TikZ?
154780
Plot to illustrate secant lines
44159
How can I draw a tangent ending smoothly in a circle?
149147
Plot that draws a dashed/solid curve depending on the y-value of the curve
66288
How do I draw an annulus (doughnut) using GDI+?
144901
Tangent to a circle through a point
32214
Which package can easily write a graph, as an arbitrary curve or area, just for indication
135306
Recreate specific plot in Mathematica
45407
Manipulate gives the output as a blank plot, but I'm not sure why