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Right Triangle Trigonometry Definition. What are sine, cosine, and tangent? But the designations of opposite and adjacent can change — depending on which angle you're referring to.
Measuring angles in radians first, let's introduce the units you will be using to measure angles, radians. Learn vocabulary, terms and more with flashcards, games and other study tools. The label hypotenuse always remains the same — it's the longest side.
A right triangle is defined as having one angle precisely equal to 90o (a right angle).
We learn that the six trigonometric functions can be evaluated using. Using right triangles to evaluate trigonometric functions. For example, trigonometry concerns itself almost exclusively with the properties of right triangles, and the famous pythagoras theorem defines the relationship between the three. Another angle is often labeled θ.
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