Using the Cosine Ratio in Right Triangles

The video tutorial explains how to solve a problem involving a ladder leaning against a house using the cosine ratio. It introduces the concept of right triangles and the cosine ratio, reviews the sine ratio, and demonstrates the application of the cosine ratio in various examples. The tutorial also clarifies common misunderstandings about the cosine ratio and concludes by solving the ladder problem, determining the necessary ladder length using trigonometric principles.

Describe the relationship between the sides of similar right triangles.

What is the cosine ratio in a right triangle?

What is the significance of the angle in determining the cosine ratio?

Explain why the cosine ratio can only be used in right triangles.

How do you calculate the length of the hypotenuse using the cosine ratio?

How can you find the cosine of an angle using a scientific calculator?

What is the length of the ladder needed for a house that is 12 feet tall at a 35 degree angle?