The Sine and Cosine Ratios
Completion requirements
Unit B: Right Triangles
Chapter 4:Trigonometry
Lesson 2: The Sine and Cosine Ratios
In the previous lesson, you learned that one of the acute angles in a right triangle and the lengths of the legs of that right triangle are related by the tangent ratio. Do you think there is a relationship that uses the longest side of a right triangle, the hypotenuse?
Here are the things you will do in this lesson:
- Learn about the sine and cosine ratios of right triangles
- Discover how the sine and cosine ratios can be used to determine unknown lengths and angle measures in right triangles.
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