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  1. Trigonometric equations and identities - Math | Khan Academy

    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 problems involving periodic …

  2. Trigonometric functions | Algebra (all content) - Khan Academy

    This topic covers: - Unit circle definition of trig functions - Trig identities - Graphs of sinusoidal & trigonometric functions - Inverse trig functions & solving trig equations - Modeling with trig …

  3. Trigonometry | Khan Academy

    Explore the world of trigonometry by mastering right triangles and their applications, understanding and graphing trig functions, solving problems involving non-right triangles, and …

  4. Intro to inverse trig functions (article) | Khan Academy

    You can start anywhere, use only the required amount of trig functions, or use trig functions to find out everything: all that matters is you choose where to start, and use the right functions from …

  5. Intro to the trigonometric ratios (video) | Khan Academy

    In this video, I want to give you the basics of trigonometry. And it sounds like a very complicated topic, but you're going to see that it's really just the study of the ratios of sides of triangles.

  6. Trig unit circle review (article) | Khan Academy

    I understand how to apply the trig ratios in their purest form (absolute and a standard right angle triangle). I also understand the theory of using the unit circle to extend the domain of sin …

  7. Trigonometry | Algebra 2 | Math | Khan Academy

    Let's extend trigonometric ratios sine, cosine, and tangent into functions that are defined for all real numbers. You might be surprised at how we can use the behavior of those functions to …

  8. The trig functions & right triangle trig ratios - Khan Academy

    Trigonometric functions can be defined and calculated independently of the unit circle, and you can use other methods, including calculators and tables, to determine their values.

  9. Integration techniques | Calculus 2 | Math | Khan Academy

    Practice Integration using trigonometric identities Get 3 of 4 questions to level up!

  10. Limits of trigonometric functions (video) | Khan Academy

    This video covers limits of trigonometric functions, focusing on sine, cosine, and tangent. It emphasizes that sine and cosine are continuous and defined for all real numbers, so their …