# 5 Best + Free Trigonometry Courses & Classes After conducting in-depth research, our team of global experts compiled this list of Best Five Trigonometry Courses, Classes, Tutorials, Training, and Certification programs available online for 2020. This list includes both paid and free courses to help high school students and engineering graduates in clearing the concepts of trigonometric functions. Also, it is ideal for beginners, intermediates, as well as experts.

## 5 Best Trigonometry Courses & Classes 

The Khan Academy offers this free course to help students learn trigonometry. Be it engineering graduates or high school students or professionals who need a revision of the mathematics concepts; this course helps better the understanding. You will learn trigonometry with right triangles and general triangles. Later in the course, you will study the unit circle and the graphs of different trigonometric functions. You will also learn the usage of equations that can be used to solve mathematical problems related to triangles. Check out our compilation of Best Mathematics Courses.

Key USPs –

– Study trigonometric ratios and similarity functions

– Understand the laws of sine and cosine

– Carry out the graphical representations of the six trigonometric functions

– Learn radians and trigonometric identities

Duration: Variable

Rating: 4.4 out of 5

### 2. Become a Trigonometry & Precalculus Master (Udemy)

Become an expert in Trigonometry and Precalculus by signing up for this Udemy course that covers everything you need to know about Trigonometry. The course is ideal for students who want to brush up their knowledge on trigonometry or the ones that have not learned about it, along with parents who are homeschooling. The course has 302 lessons with 89 quizzes for practicing. You also get ten workbooks to practice further, and the course can be accessed from anywhere. Study the formulas and graphical representations of trigonometric functions to advance your learnings.

Key USPs –

– Learn about angles and how to measure them

– Learn the circular functions along with their co-relations

– Graph the sine and cosine functions and understand the transformations

– Understand the polar coordinates and their graphing

– Learn complex numbers and matrices and the theorems governing the same

Duration: 13 Hours

Rating: 4.6 out of 5

Review: I used this course as a refresher before going back to college. It helped me pick back up and pass my placement exam so i lost 0 progress despite being out of school for 9 years. – Cody Rydell

### 3. Pre Calculus, Calculus and Trigonometry (Udemy)

This course offers more than just trigonometry lessons. You will start by studying all about functions, its range, and domain and then move on to solve mathematical problems using them. The course will explain the types of triangles, and their properties along with the trigonometric functions used to solve problems. You will also learn theorems to solve trigonometric problems and then advance towards calculus. The calculus part covers logarithmic and exponential functions along with their derivatives. You will study graph interpretations of various functions in the course, which has already benefitted more than 2500 students from 130 countries.

Key USPs –

– Learn everything you need to know about pre-calculus, calculus, and trigonometry

– Understand different types of functions, their range, and domains.

– Study the various types of triangles and their properties along with the theorems governing their problems

– Understand continuity and derivatives to solve mathematical problems

– Ideal for maths major and engineering professionals to recap mathematical knowledge

Duration: 9 Hours

Rating: 4.5 out of 5

Review: Really great course. The progression is logically structured and all topics are made crystal clear. I will definitely take his other course too. Thank you! – Aris Konstantinidis

### 4. Trigonometry – The Unit Circle, Angles, & Right Triangles (Udemy)

With a primary understanding of algebra and geometry, you can register for this trigonometry course on Udemy to learn more in-depth. Students will learn about different types of angles and their conversions from degree to radian and vice versa. The course elaborates on the unit circle and the trigonometric functions. Later you will learn about how to plot graphs for the trigonometric functions. You can quickly grasp the concepts with the video tutorials, and once you are through the course, you will get the certificate of completion to add to your job profile.

Key USPs –

– Understand angles and its conversions from degree to radian and vice versa

– Learn the unit circle and the six trigonometric functions

– Study the different types of triangles and the Pythagorean theorem

– Graphs of the trigonometric functions along with their domain and range information

– Learn the inverse trigonometric functions

Duration: 19.5 Hours

Rating: 4.7 out of 5

Review: I don’t think anyone will ever know how grateful I am for all of these videos that literally saved my behind in my math class. I probably would have failed or did poorly if it wasn’t for these well explained and organized video. – Luis Garcia

### 5. Dave’s Short Trig Course (Clark University)

This is a short course on Trigonometric functions that can help you understand the fundamental concepts of trigonometry. You will learn the practical applications of trigonometry and why it is essential to learn this field of mathematics. The course gives a brief background of geometry and then advances towards different types of angles, triangles and the Pythagorean theorem. You will learn about chords and their significance in trigonometry. Once you are through with the six main trigonometric functions, you will learn their inverse formulas too. For practicing, each chapter has exercise questions to test your knowledge. You also get a quick recap of the learnings in the last modules.

Key USPs –

– Understand trigonometry and its real-world applications

– Learn the Pythagorean theorem and similar triangles

– Calculate trigonometric functions and their inverses

– Understand the concept of angles and their measurements

– Learn Ptolemy’s theory to perform operations on sine formulas

– A quick summary of the learnings

Duration: Variable

Rating: 4.3 out of 5