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Lesson 9-8 Pages 477-481

Lesson 9-8 Pages 477-481. Sine, Cosine, and Tangent Ratios. Lesson Check 9-7. What you will learn!. How to find sine, cosine, and tangent ratios. How to solve problems by using the trigonometric ratios. Vocabulary. Trigonometry: the study of the properties of triangles.

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Lesson 9-8 Pages 477-481

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  1. Lesson 9-8Pages 477-481 Sine, Cosine, and Tangent Ratios Lesson Check 9-7

  2. What you will learn! • How to find sine, cosine, and tangent ratios. • How to solve problems by using the trigonometric ratios.

  3. Vocabulary

  4. Trigonometry: the study of the properties of triangles. Trigonometric ratio: the ratio of the lengths of two sides of a right triangle.

  5. The most common trigonometric ratios are: Sine (sin) Cosine (cos) Tangent (tan)

  6. What you really need to know!

  7. Example 1: Find sin A, cos A, and tan A.

  8. Example 1: Find sin A, cos A, and tan A.

  9. Example 1: Find sin A, cos A, and tan A.

  10. Example 1: Find sin A, cos A, and tan A.

  11. Example 2: Find each value to the nearest thousandth.

  12. Example 3: Find the missing measure. Round to the nearest tenth.

  13. Example 3: Find the missing measure. Round to the nearest tenth.

  14. Example 4: A tourist visiting the Petronas Towers in Kuala Lumpur, Malaysia, stands 261 feet away from their base. The looks at the top at an angle of 80° with the ground. How tall are the towers?

  15. x 80° A 261 ft

  16. Page 479 Guided Practice #’s 3-12

  17. Read: Pages 477-479 with someone at home and study examples!

  18. Homework: Pages 480-481 #’s 14-38 even #’s 44-52 Lesson Check Ch-9

  19. Page 747 Lesson 9-8

  20. Lesson Check Ch-9

  21. Study Guide and Review Pages 483-486 #’s 1-38 (Odd answers in back of book)

  22. Prepare for Test! Page 487 #’s 1-14, 16, 20

  23. Prepare for Test! Pages 488-489 1-23

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