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Use your calculator to find each trigonometric ratio. Round to the nearest hundredth. 9. sin 42° 10. cos 89° 11. tan 55° 12. sin 6° Find each length. Round to the nearest hundredth. 13. DE 14. FH 10 in. 31 18 m 27 15. JK 16. US 34.6 mm 22.5 cm 66 18

Use your calculator to find each trigonometric ratio. Round to the nearest hundredth. 9. sin 42° 10. cos 89° 11. tan 55° 12. sin 6° Find each length. Round to the nearest hundredth. 13. DE 14. FH 10 in. 31 18 m 27 15. JK 16. US 34.6 mm 22.5 cm 66 18

Algebra and Trigonometry (MindTap Course List)
Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter5: Trigonometric Functions: Right Triangle Approach
Section5.2: Trigonometry Of Right Triangles
Problem 72E
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Name Date Class LESSON Reteach 8-2 Trigonometric Ratios continued You can use a calculator to find the value of trigonometric ratios. cos 38° = 0.7880107536 or about 0.79 You can use trigonometric ratios to find side lengths of triangles. Find WY. cos W = adjacent leg hypotenuse Write a trigonometric ratio that involves WY. 7.5 cm 7.5 cm cos 39° = WY Substitute the given values. 39 7.5 WY = Solve for WY. cos 39° WY = 9.65 cm Simplify the expression. Use your calculator to find each trigonometric ratio. Round to the nearest hundredth. 9. sin 42° 10. cos 89° 11. tan 55° 12. sin 6° Find each length. Round to the nearest hundredth. 13. DE 14. FH 10 in. Dr 31 18 m 27 E 15. JK 16. US 34.6 mm 22.5 cm 66 18 K Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Geometry
Transcribed Image Text:Name Date Class LESSON Reteach 8-2 Trigonometric Ratios continued You can use a calculator to find the value of trigonometric ratios. cos 38° = 0.7880107536 or about 0.79 You can use trigonometric ratios to find side lengths of triangles. Find WY. cos W = adjacent leg hypotenuse Write a trigonometric ratio that involves WY. 7.5 cm 7.5 cm cos 39° = WY Substitute the given values. 39 7.5 WY = Solve for WY. cos 39° WY = 9.65 cm Simplify the expression. Use your calculator to find each trigonometric ratio. Round to the nearest hundredth. 9. sin 42° 10. cos 89° 11. tan 55° 12. sin 6° Find each length. Round to the nearest hundredth. 13. DE 14. FH 10 in. Dr 31 18 m 27 E 15. JK 16. US 34.6 mm 22.5 cm 66 18 K Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. Holt McDougal Geometry
Name Date Class LESSON Reteach 8-2 Trigonometric Ratios Trigonometric Ratios leg opposite ZA_ 4 = 0.8 hypotenuse leg opposite ZA sin A = %3D hypotenuse 5. leg adjacent to ZA 3 hypotenuse leg opposite ZA leg adjacent to ZA cos A = = 0.6 4 =1.33 3 tan A = %3D leg adjacent to ZA You can use special right triangles to write trigonometric ratios as fractions. sin 45° = sin Q = leg opposite ZQ hypotenuse 60 1 45 2x %3D xv2 v2 30 xV3 /45° %3D 2 So sin 45° = 2 Write each trigonometric ratio as a fraction and as a decimal rounded to the nearest hundredth. 17 8 1. sin K 2. cos H 15 3. cos K 4. tan H Use a special right triangle to write each trigonometric ratio as a fraction. 5. cos 45° 6. tan 45° 7. sin 60° 8. tan 30° Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. 8-14 Holt McDougal Geometry
Transcribed Image Text:Name Date Class LESSON Reteach 8-2 Trigonometric Ratios Trigonometric Ratios leg opposite ZA_ 4 = 0.8 hypotenuse leg opposite ZA sin A = %3D hypotenuse 5. leg adjacent to ZA 3 hypotenuse leg opposite ZA leg adjacent to ZA cos A = = 0.6 4 =1.33 3 tan A = %3D leg adjacent to ZA You can use special right triangles to write trigonometric ratios as fractions. sin 45° = sin Q = leg opposite ZQ hypotenuse 60 1 45 2x %3D xv2 v2 30 xV3 /45° %3D 2 So sin 45° = 2 Write each trigonometric ratio as a fraction and as a decimal rounded to the nearest hundredth. 17 8 1. sin K 2. cos H 15 3. cos K 4. tan H Use a special right triangle to write each trigonometric ratio as a fraction. 5. cos 45° 6. tan 45° 7. sin 60° 8. tan 30° Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. 8-14 Holt McDougal Geometry
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