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Geometry with McCarthy

Section 8-5: Law of Sines and Law of Cosines. Geometry with McCarthy. Missy McCarthy Okemos High School Math Instructor. What you’ll learn . Objective: Use the Law of Sines and Law of Cosines to solve problems with triangles. Obtuse Angles.

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Geometry with McCarthy

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  1. Section 8-5: Law of Sines and Law of Cosines

    Geometry with McCarthy

    Missy McCarthy Okemos High School Math Instructor
  2. What you’ll learn Objective: Use the Law of Sines and Law of Cosines to solve problems with triangles.
  3. Obtuse Angles Up until this point, we’ve been focused on right triangles and trigonometric values for acute angles. a. tan 165° b. sin 94 °
  4. Law of Sines
  5. Law of Sines For any triangle ABC with sides a, b, and c.
  6. Example
  7. Example
  8. Law of Cosines For any triangle ABC with sides a, b, and c.
  9. Example
  10. Example
  11. Example
  12. Wrap-Up Re-watch any parts of the video for a full understanding of Law of Sines and Law of Cosines If you’re watching on YouTube, type questions in the comments section or jot them down and bring them to class. Lesson quiz and worksheets tomorrow in class.
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