Algebra means symbol manipulation. I'm sure you can see how manipulating symbols is essential to computer science. Calculus isn't used much because it depends o

Algebra means symbol manipulation. I'm sure you can see how manipulating symbols is essential to computer science. Calculus isn't used much because it depends on infinite processes. But numerical approximations, based on results from calculus are. For example, the trigonometric functions are implemented using Taylor polynomials which we, thanks to calculus, know are good approximations of them.