The Precalculus course covers complex numbers; composite functions; trigonometric functions; vectors; matrices; conic sections; and probability and combinatorics.

Get ready for Precalculus! Learn the skills that will set you up for success in complex numbers; polynomials; composite and inverse functions; trigonometry; vectors and matrices; series; …

Explore series and sequences with Khan Academy's precalculus course, offering comprehensive lessons for mastering advanced mathematical concepts.

These articles, activities, and videos will get you practicing using formulas, notation, and graphs, and prepare you for working with sequences and series in precalculus and calculus.

With a mix of engaging lessons, practice problems, and instructional videos, this course supports critical thinking and problem-solving at a high level. Let's start learning!

Learn precalculus in preparation for calculus. We cover trigonometry, conic sections, matrices, complex numbers, combinatorics, and more. (aligned with Common Core standards)

Knowing trig identities is one thing, but being able to prove them takes us to another level. In this unit, we'll prove various trigonometric identities and define inverse trigonometric functions, …

Created by experts, Khan Academy’s library of trusted, standards-aligned practice and lessons covers math K-12 through early college, grammar, science, history, AP®, SAT®, and more.

Learn Precalculus aligned to the Eureka Math/EngageNY curriculum —complex numbers, vectors, matrices, and more.

Get ready for Precalculus! Learn the skills that will set you up for success in complex numbers; polynomials; composite and inverse functions; trigonometry; vectors and matrices; series; …