Trigonometric equations and identities - Math | Khan Academy
https://www.khanacademy.org/math/trigonometry/trig-equations-and-identities
In this unit, you'll explore the power and beauty of trigonometric equations and identities, which allow you to express and relate different aspects of triangles, circles, and waves. You'll learn how to use trigonometric functions, their inverses, and various identities to solve and check equations and inequalities, and to model and analyze ...
DA: 86 PA: 81 MOZ Rank: 58