# Trigonometry

The best videos, books, apps, and other learning resources our members recommend:

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Graphs of trigonometric functions

High School - College |
Online class
Sal draws the graph of the tangent function based on the unit circle definition of the function.

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Life of Fred Trigonometry Expanded Edition

High School |
Book
A day and a half in our hero’s life.

• Cuisine! See what dinner in a limo is really like

• Entrepreneurship! Learn how to create a best-selling board game

• Sports! Witness the...

*$39*

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Math Curriculum Trigonometry

High School |
Online resource
Trigonometry

Angles and Triangles

Unit Preview, Measuring Angles, Areas of Triangles

Sine and Cosine Functions – Part I

Unit Preview, Definitions – Sine and Cosine, Identities ,...

*$360 yearly*

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Trigonometric equations and identities

High School - College |
Online class
Learn about the inverse functions of sine, cosine, and tangent, and how they are defined even though the functions are not really invertible. These functions will be very helpful when you will...

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Trigonometric equations and identities

High School - College |
Online class
Learn about the inverse functions of sine, cosine, and tangent, and how they are defined even though the functions are not really invertible. These functions will be very helpful when you will...

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Trigonometry

7th - High School |
Online resource
Free, interactive video lessons on trigonometry! Trigonometry helps you understand any topic that involves distances, angles, or waves. The trig functions (sin, cos, and tan) show up all over...

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Trigonometry

7th - High School |
Online class
Missions recommend what to learn next, help you remember what you’ve learned by mixing skills, and save your progress.

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Trigonometry

7th - 9th |
Online resource
Practice trigonometry skills on IXL, have fun, and win awards!

*$10 monthly*

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Trigonometry Help

7th - High School |
Online resource
Trying to keep up with trig can be hard at first — suddenly you’re learning new terms like sine, cosine, and tangent, and having to figure out more triangles than you ever cared about....

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Trigonometry (online)

High School |
Online class
This course addresses analyzing functions, transformations, and inverse functions. Students will also learn about radians, the unit circle, right-triangle trigonometry, trigonometric functions,...

*$150*

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Trigonometry Online Course

High School - College |
Online class
Join Dr. William Murray in his Trigonometry online course which breaks down difficult-to-understand concepts with clear explanations and tons of example walkthroughs. Dr. Murray brings his 15+...

*$35 monthly*

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Trigonometry with general triangles

5th - 8th |
Online class
Learn about the Law of sines and how to use it in order to find missing side lengths and angles in general triangles.