安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Trigonometric functions | Trigonometry | Math | Khan Academy
Discover how to measure angles, distances, and heights using trigonometric ratios and the unit circle Learn how to use sine, cosine, and tangent to solve real-world problems involving triangles and circular motion
- Using trigonometric identities (video) | Khan Academy
Trigonometric identities like sin²θ+cos²θ=1 can be used to rewrite expressions in a different, more convenient way For example, (1-sin²θ) (cos²θ) can be rewritten as (cos²θ) (cos²θ), and then as cos⁴θ Created by Sal Khan
- Trigonometric equations and identities | Khan Academy
This unit focuses on mastering key trigonometric identities to simplify expressions and solve equations You’ll develop strategies for manipulating and proving identities, then apply them to solve a variety of trigonometric equations
- 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
|
|
|