This is so stupid, the "primer on the basics" should be "Algorithmization for Computer Science", not a 900+ page math textbook (that doesn't even explore graph theory, calculus and differential calculus).
We detached this subthread from https://news.ycombinator.com/item?id=13800495 and marked it off-topic.
It can be, depending on what you're doing. Look at back-propagation in neural networks for example, where the whole thing is based on the chain rule from Calculus.