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Name _________________________________________________________ Date _________ 9.6 Practice A In Exercises 1–3, determine which of the two acute angles has the given trigonometric ratio. 1. The sine of the angle is 8 . 17 2. The cosine of the angle is 15 . 17 3. The tangent of the angle is 15 . 8 In Exercises 4–6, let ∠ B be an acute angle. Use a calculator to approximate the measure of ∠ B to the nearest tenth of a degree. 4. sin B = 0.64 5. cos B = 0.12 6. tan B = 2.18 In Exercises 7–9, solve the right triangle (Find all the missing sides and all the angles). Round decimal answers to the nearest tenth. 7. 8. 316 Geometry Resources by Chapter 9. Copyright © Big Ideas Learning, LLC All rights reserved. 10. Use the diagram to find the distance across the suspension bridge. Round your answer to the nearest foot. 11.Use the diagram to find the acute angle formed by Washington Boulevard and Willow Way. Round your answer to the nearest tenth. 9.6 Practice B In Exercises 6–8, solve the right triangle. Round decimal answers to the nearest tenth. 6. Copyright © Big Ideas Learning, LLC All rights reserved. 7. 8. Geometry Resources by Chapter 317 9.6 Practice A 1. R 2. R 3. Q 4. 39.8° 5. 83.1° 6. 65.4° 7. m P = 53°,QR Η17.6,PR Η13.2 8. m D Η 42.7°,DF Η 20.6,m E Η 47.3° 9. m A = 39°, BC Η11.3, AB Η18.0 10. 499 ft 11. 27.4° 9.6 Practice B 1. W 2. X 3. 24.2° 4. 87.1° 5. 79.1° 6. m T = 66°,ST Η 36.1,RT Η14.7 7. m E Η 41.4°,EF = 9,m D Η 48.6° 8. m P Η17.7°,PQ Η 21.9,m R Η 72.3° 9. a. about 1039 ft b. about 1648 ft c. about 609 ft 10. a. about 0.1 mi b. about 0.8 mi c. about 7.1° 316 Geometry Resources by Chapter Copyright © Big Ideas Learning, LLC All rights reserved.