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Name LESSON Date Class Practice B 13-1 Right-Angle Trigonometry Find the value of the sine, cosine, and tangent functions for . 1. 2. S 3. S S 9 ; ___ 40; ___ 9 ___ 3; __ 4 ; __ 4 __ 5 5 3 5 ; ___ 12 ; ___ 12 ___ 13 13 5 41 41 40 Use a trigonometric function to find the value of x. 4. 5. 6. o o X X X o 44 兹 3 ______ 6 兹3 7 3 Find the values of the six trigonometric functions for . 7. S 8. 9. S S 5 ; tan __ 12 ; cos __ 12 sin __ 5 13 13 3; cos _ 3 4 ; tan __ sin _ 5 5 4 9 ; cos ___ 40; tan ___ 9 sin ___ 41 41 40 13; sec __ 13 ; cot __ 5 csc __ 5 12 12 5; sec __ 5; cot __ 4 csc __ 4 3 3 40 41; sec __ 41; cot __ csc __ 40 9 9 Solve. 10. A water slide is 26 feet high. The angle between the slide and the water is 33.5°. What is the length of the slide? 47 ft 11. A surveyor stands 150 feet from the base of a viaduct and measures the angle of elevation to be 46.2°. His eye level is 6 feet above the ground. What is the height of the viaduct to the nearest foot? 162 ft 12. The pilot of a helicopter measures the angle of depression to a landing spot to be 18.8°. If the pilot’s altitude is 1640 meters, what is the horizontal distance to the landing spot to the nearest meter? Copyright © by Holt, Rinehart and Winston. All rights reserved. a207c13-1_pr.indd 4 4 4817 m Holt Algebra 2 1/4/06 4:46:56 PM Process Black