Math Question:

What are the conditions for Newton's method to converge?
Specifically: How fine a net of initial values would I need to cast to find all real zeros(in t) of

`` cos(ct) - cos(d)•cos(t0-t)`` ?

c, d and t0 are real numbers.

#mathquestion #newtonsmethod

Does anyone know where I can find some good references for how different cultures did math? Ideally something approachable, and the more unexpected and unusual the better.

This was an interesting reference, and has some elements of what I'm looking for:
https://ethw.org/Ancient_Computers

#MathQuestion #HistoryOfMath #MathAndCulture

#ismyplantamathematician #mathquestion