In computer science, a math library (or maths library) is a component of a programming language's standard library containing functions (or subroutines) for the most common mathematical functions, for example trigonometry and exponentiation, etc.
Examples include:-
In some languages (such as haskell) parts of the standard library (including maths) are imported by default.
More advanced functionality such as linear algebra is usually provided in 3rd party libraries, such as a linear algebra library or vector maths library.