1 / 12

GEOMETRY: Chapter 9

GEOMETRY: Chapter 9. 9.5 Trigonometric Ratios PPT#2. Sine and Cosine Ratios. Image taken from: Geometry. McDougal Littell: Boston, 2007. P. 473. Ex.1: Find sin A and sin B . Write each answer as a fraction and as a decimal rounded to four places.

anakin
Download Presentation

GEOMETRY: Chapter 9

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. GEOMETRY: Chapter 9 9.5 Trigonometric Ratios PPT#2

  2. Sine and Cosine Ratios Image taken from: Geometry. McDougal Littell: Boston, 2007. P. 473.

  3. Ex.1: Find sin A and sin B. Write each answer as a fraction and as a decimal rounded to four places. Image taken from: Geometry. McDougal Littell: Boston, 2007. P. 474.

  4. Ex.1: Find sin A and sin B. Write each answer as a fraction and as a decimal rounded to four places. Answer: sin A = 8/17 ~ 0.4706 sin B= 15/17~0.8824 Image taken from: Geometry. McDougal Littell: Boston, 2007. P. 474.

  5. Ex. 2: Find cos P and cos R. Write each answer as a fraction and as a decimal rounded to four places. Images taken from: Geometry. McDougal Littell: Boston, 2007. P. 474.

  6. Ex. 2: Find cos P and cos R. Write each answer as a fraction and as a decimal rounded to four places. Answer: cos P =√5/3~0.7454; cos R=2/3~0.6667 Images taken from: Geometry. McDougal Littell: Boston, 2007. P. 474.

  7. Ex. 3: A rope, staked 20 feet from the base of a building, goes to the roof and forms an angle of 58 degrees with the ground. To the nearest tenth of a foot, how long is the rope? Images taken from: Geometry. McDougal Littell: Boston, 2007. P. 475.

  8. Ex. 3: A rope, staked 20 feet from the base of a building, goes to the roof and forms an angle of 58 degrees with the ground. To the nearest tenth of a foot, how long is the rope? Answer: 37.7 ft Images taken from: Geometry. McDougal Littell: Boston, 2007. P. 475.

  9. Angles—If you look up at an object, the angle your line of sight makes with a horizontal line is called the angle of elevation. If you look down at an object, the angle your line of sight makes with a horizontal line is called the angle of depression. Images taken from: Geometry. McDougal Littell: Boston, 2007. P. 475.

  10. Ex. 4: A pilot is looking at an airport from her plane. The angle of depression is 290. If the plane is at an altitude of 10,000 feet, approximately how far is it from the airport? Answer: 20,627 ft

  11. Ex. 5: A dog is looking at a squirrel at the top of a tree. The distance between the two animals is 55 feet and the angle of elevation is 640. How high is the squirrel and how far is the dog from the base of the tree? Answer: 49.4ft high; 24.1 ft from the tree

  12. 9.5 p. 562-563 #3-36 all

More Related