Khan Academy
Khan Academy: Basic Trigonometric Ratios: Basic Trigonometry
Video introducing the basic trigonometry ratios sine, cosine, and tangent.
Imagine Learning Classroom
Learn Zillion: Find Tangent Value Using Side Ratios
In this lesson, you will learn how the ratios of certain sides of the triangle determine the tangent value of a particular angle by using properties of similar triangles. [2:13]
Study Pug
Study Pug: Solving Trigonometric Equations Involving Multiple Angles
This video explains how to solve trigonometric equations involving multiple angles. [18:44]
Study Pug
Study Pug: Solving First Degree Trigonometric Equations
Trigonometric equations are just equations that feature the trigonometric ratios such as sine and cosine on the variable "x". Because of the presence of these trigonometric functions, solving these equations becomes a little more...