Lesson 3.2: The Sine and Cosine Ratios
Lesson 3.2: The Sine and Cosine Ratios
Lesson 3.2 video link
. (Video under development)
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?
In
Lesson 3.2, you will learn about
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the sine and cosine ratios of right triangles
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how the sine and cosine ratios can be used to determine unknown lengths and angle measures
Warm Up
The tangent ratio uses the length of the side opposite
and the length of the side adjacent to
in a right triangle. What other pairs of sides can you identify from the triangle shown?
