Skip to content
UdemyMathPaid courseAll LevelsCertificate

Become a Trigonometry & Precalculus Master (Udemy.com)

Learn everything from Trigonometry and Precalculus, then test your knowledge with 470+ practice questions

Created by: Krista King

Last updated August 2026

icon
What you will learn

  • Angles and their measure, including degrees, DMS and radians
  • Six circular functions, including sine, cosine, tangent, cosecant, secant, and cotangent
  • The unit circle, including finding sine and cosine, and how to complete a triangle
  • Angles in circles, including oriented arcs, circular sectors, and linear and angular velocity
  • Graphing the trig functions, including sine and cosine graphs, and transformations
  • Inverse trig functions, including their graphs
  • Trig identities, including even-odd, sum-difference, half-angle, double-angle, product-to-sum, and sum-to-product identities
  • The law of sines and the law of cosines, including Heron's formula
  • Polar curves, including converting coordinates and graphing polar curves
  • Complex numbers, including polar forms and De Moivre's theorem
  • Matrices, including solving systems, Gauss-Jordan elimination, and transformations and inverses

How it compares

Against the other 127 rated Udemy courses in Math on CourseDuck:

  • Rating4.7 out of 5higher than 51% of them
  • Reviews4,918#7 of 128 by number of reviews
  • Length19.6 hourslonger than 75% of them
  • Last updatedAugust 2026more recently than 91% of them

icon
Course Description

HOW BECOME A TRIGONOMETRY & PRECALCULUS MASTER IS SET UP TO MAKE COMPLICATED MATH EASY:

This 302-lesson course includes video and text explanations of everything from Trigonometry and Precalculus, and it includes 89 quizzes (with solutions!) and an additional 10 workbooks with extra practice problems, to help you test your understanding along the way. Become an Trigonometry & Precalculus Master is organized into the following sections:

  • Angles and their measure, including degrees, DMS, and radians

  • Angles in circles, including oriented arcs, circular sectors, and linear and angular velocity

  • The six circular functions, which are sine, cosine, tangent, cosecant, secant, and tangent

  • The laws of sine and cosine, including Heron's formula

  • The unit circle, and how to use it to complete a triangle

  • Graphing the trig functions using period and amplitude, horizontal and vertical shifts, and other transformations

  • Trig identities like even-odd, sum-difference, double-angle, half-angle, product-to-sum, and sum-to-product

  • Inverse trig functions and their graphs

  • Polar coordinates and graphing polar curves

  • Complex numbers, including polar forms and De Moivre's Theorem

  • Matrices for solving systems, Gauss-Jordan elimination, transformations and inverse matrices

  • Partial fractions, distinct and repeated, linear and quadratic factors

  • Conic sections and analytic geometry of circles, ellipses, parabolas, and hyperbolas

  • Parametric curves and how to sketch their graphs



AND HERE'S WHAT YOU GET INSIDE OF EVERY SECTION:

Videos: Watch over my shoulder as I solve problems for every single math issue you’ll encounter in class. We start from the beginning... I explain the problem setup and why I set it up that way, the steps I take and why I take them, how to work through the yucky, fuzzy middle parts, and how to simplify the answer when you get it.

Notes: The notes section of each lesson is where you find the most important things to remember. It’s like Cliff Notes for books, but for math. Everything you need to know to pass your class and nothing you don’t.

Quizzes: When you think you’ve got a good grasp on a topic within a course, you can test your knowledge by taking one of the quizzes. If you pass, great! If not, you can review the videos and notes again or ask for help in the Q&A section.

Workbooks: Want even more practice? When you've finished the section, you can review everything you've learned by working through the bonus workbook. The workbooks include tons of extra practice problems, so they're a great way to solidify what you just learned in that section.



HERE'S WHAT SOME STUDENTS OF BECOME A TRIGONOMETRY & PRECALCULUS MASTER HAVE TOLD ME:

  • "Krista's courses are the absolute best you can find online, as far as I'm concerned. I feel like I am actually learning something from them!" - Jon K.

  • “The Instructor has an excellent command of the subject material and a great way of presenting it. In addition to that, she has a very pleasant voice that keeps you attentive.” - Robert S.

  • “This is an excellent course to become more familiar with trigonometric equations. The step by step instruction is very is to follow. I found it very helpful to follow along with solving the problems on paper to solidify the learning experience.” - David M.

  • “Krista explains everything in "simplest terms" so even if you haven't worked with this stuff for a while, she makes it totally easy to get back into the swing of it all. Thanks for (another) excellent course!” - Paul L.

  • “Huge help to be able to review these in a platform much more suited to learning than YouTube.” - Wesley F.



YOU'LL ALSO GET:

  • Lifetime access to Become a Trigonometry & Precalculus Master

  • Friendly support in the Q&A section

  • Udemy Certificate of Completion available for download

  • 30-day money back guarantee


Enroll today!

I can't wait for you to get started on mastering trigonometry and precalculus.

- Krista :)



icon
Udemy Discount

The discount is applied through our link. Open the course from here and Udemy's current promotional price is applied at checkout on most courses, no code to type.

Some courses are excluded from Udemy's promotions. If the price does not drop, clear your browser cookies and use the button again.

icon
Instructor Details

Krista King

Hey, I’m so glad you’re here! My goal is to help you feel confident and capable in math. In my courses you’ll find clear, step-by-step videos, notes, and tons of practice materials designed to help you learn exactly what you need — so you can save time, truly understand the concepts, and see just how much math you can master.

I teach every level, from Pre-Algebra, Algebra, and Geometry through Trigonometry, Precalculus, and Probability & Statistics, all the way up to Calculus, Differential Equations, and Linear Algebra.

icon
More courses by Krista King

$159.99

$15.99

$19.99

$19.99

$149.99

$22.99

icon
More Math courses

$74.99

$22.99

$84.99

$10.99

$11.99

$74.99

icon
Reviews

4.7

4,918 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By Andrea Brenna on 7/18/2026

The course covers a wide range of trigonometry topics and provides many useful examples and exercises. However, in my opinion, several important concepts are presented too procedurally, with formulas often introduced without enough conceptual explanation or derivation. For students who simply want to memorize patterns and apply formulas, the course may still be useful. But for learners who want to deeply understand where the identities come from and how the notation works, some lessons can feel rushed or unclear. In particular, I found that some changes of variables and trigonometric identities were explained in a way that could easily confuse students. Overall, the course has good content coverage, but I think it would benefit a lot from clearer derivations, better notation, and more conceptual explanations.

By Primrose Gyasi on 3/10/2026

She speaks really clearly and she breaks it down more and gives lots of examples for you to understand, which helped me understand precalculus better and pass my class.

By Vigneash Sivaramakrishnan on 2/13/2026

Very good to learn and move from beginner-Intermediate level . Post that it depends on the individual learner to take it to advanced level . I like this course and it builds a solid foundation.

By Cristos Filippopoulos on 1/25/2026

Teacher Krista is very knowledgeable she explains hard concepts in a very simple way and on top of that she provide us with useful examples of possible questions on that subject

By Courtney Greene on 1/4/2026

The instructor explains concepts clearly and reemphasizes them.

By Lalith Aditya Na Lokarapu on 1/4/2026

I'm only using this for more knowledge on Precalculus. However, I was blown away by how detailed and friendly each of the lessons are. If you were a complete beginner, I think you would pick up pretty quickly.

By Plrkannan on 11/30/2025

yes it is a great course i have already used krista king's become an algebra master course and it was amazing after i completed that, i took up this course this really helps for upcoming high school i am in eighth grade this will really benefit me

By Natasha Osborne on 11/24/2025

I'm going through the first section on angles, and so far the concepts are broken down completely and really well. I'm also really grateful for the explanation break down for quizzes that is provided. For context, I'm trying to become good/comfortable with calculus for a master's program. If this is you too, this course might be for you

By Edwin on 10/29/2025

This course truly lives up to being a master class in Precalculus. It's such a well-explained and easy-to-follow course thanks to Krista. Having completed her Geometry course, and now near the end of this one, I can't wait to get into her Calculus course. It's the biggest compliment I could give: She just makes you want to learn more.

By Alexander Verner on 10/2/2025

The course covers a wide range of topics, some of which are quite advanced and are rarely covered in other similar courses. The material is covered in detail and includes numerous useful examples with complete solutions. There are mistakes here and there, but the course staff is constantly working to correct them, making the quality even better.

By Patrick Brown on 11/15/2020

Still early on but I have several of these courses and all have been super helpful

By Muthahir on 11/15/2020

very clear explanation

Showing 12 of 321 reviews

icon
Quality Score

No CourseDuck member has rated this course yet. Taken it? Give each part a thumbs up or down.

Content Quality
/
Video Quality
/
Qualified Instructor
/
Course Pace
/
Course Depth & Coverage
/

Overall Score : 94 / 100