Hi all,

I wonder if there is any way to draw (automatically):

- a secant line
- a tangent line

with known function and a point at that function, is it possible?

I use pyplot backend, but I want to know other backend plotting / package that can plot them nicely. Or perhaps by using function is able too?

```
using Plots, LaTeXStrings
pyplot(fmt=:svg)
a, b = -3,3
h(x) = x^2
plot(h, a, b; legend=:outerright, label=L"\sin \frac{1}{x}", framestyle=:zerolines,
xlims = (-3,3), xticks = -3:1:3,
ylims = (-2,2), yticks = -2:1:2,
size=(720, 360))
```