What level of math does one need to understand to take this course?
I haven't taken that Coursera course, but in college, I believe only calc I and II are the prereqs for intro to data structures and algorithms. Though I know solid engineers who understand applied CS who don't have a good grasp of math at all.
Me in freshman calculus: Why are we learning these Taylor series? It's so boring, and I'll never need to use it
Me three years later in upper-division meteorology: It turns out 90% of what we do is numerical methods because fluid dynamics is hard with limited data.
It's definitely easier for me to learn things when I have an application for it.