4.4.4 Test (TS): Trigonometry Test Archis Chinmulgund Geometry Sem 1 (S4039483) Points possible: 50 Date: ____________ Answer the following questions using what you've learned from this unit. Write your answers in the space provided. Be sure to show all work. 1. Use the trigonometric ratios sine, cosine, and tangent to answer the following questions. Part I: Find the sine, cosine, and tangent ratios of . (3 points) Part II: Find the sine, cosine, and tangent ratios of . (3 points) Part III: Using your answers from parts I and II, what is significant about the Explain your answer. (2 points) and the ? Part IV: Using your answer from parts I and II, how are the tangents of and related to each other? Explain your answer. (1 point) 2. A ski resort is building a new ski lift that will transport tourists from the base of the mountain to its highest point. This mountain has a vertical height of 200 yards, and the ski lift will rise at an angle of 40 degrees. When the project is completed, how many yards, d, will a tourist travel from the base of the mountain to its peak? Part I: Sketch a figure to illustrate the scenario above. Label the vertices and the lengths that are given in the question. (3 points) Part II: Using your sketch from Part I, write an equation using a trigonometric ratio to find the distance a tourist will travel from the base of the mountain to its peak. Round your answer to the nearest 100th. Show your work. (2 points) 3. Darcy mounted a motion sensor so it would light a path to the door on her deck. If you know AB = 10 feet, and BE and BD trisect ABC, what is the perimeter of the deck area to the right of the beam of light (BDC)? Part 1: What other angles or sides of BDC can you label given that side AB is 10 feet, BE and BD trisect ABC? Label the diagram accordingly, and explain your reasoning. (4 points) Part 2: Use the trigonometric ratios 30 and 60 to calculate and label the remaining sides of BDC. Show your work. (3 points) Part 3: Use the Pythagorean Theorem to calculate the length of side BD. Does this method verify the length you found using trigonometric ratios? (2 points) Part 4: What is the perimeter of the area to the right of the beam of light on Darcy's deck (BDC)? Show your work. Use your calculator to round your final answer to the nearest foot. (3 points) 4. Two cars are starting from positions that are 20 miles apart. They are both headed for the same intersection, as depicted in the diagram below. Car A is traveling at 30 mph, and Car B is traveling at 45 mph. Which car will reach the intersection first? Part I: Use the law of cosines to determine how far Car B has to travel to reach the intersection. (2 points) Part II: Use to determine the time necessary for Car A to reach the intersection. Round your answer to the nearest hundredth of an hour. (1 point) Part III: Use (1 point) to determine the time necessary for Car B to reach the intersection. Part IV: Which car reaches the intersection first, and by how many hours? (2 points) 5. Solve for the missing length and the other two angles in the triangle below. Part I: Use the law of cosines to find the missing third side. (2 points) Part II: Use either the law of cosines or the law of sines to find the measure of angle C. (2 points) Part III: Use any method you like to find the measure of angle B. (1 point) 6. Solve the triangle below. Part I: Use the law of cosines to find the measure of angle B. (2 points) Part II: Use the law of sines to find the measure of angle C. (2 points) Part III: Use any method you like to find the measure of angle A. (1 point) 7. Assume two people, Swanson and Suzie, are standing 35 feet apart and are watching a boat race. At a given moment, Swanson approximates the angle formed by the lead boat, himself, and Suzie to be Suzie approximates the angle formed by the lead boat, herself, and Swanson to be . . How far is the boat from Swanson? Part I: What is the missing angle in this triangle? (1 point) Part II: Use the law of sines to find the distance from Swanson to the boat. (2 points) 8. Solve the following triangle for all missing sides and angles. Part I: Find the measure of angle B. (1 point) Part II: Use the law of sines to find the length of side a. (2 points) Part III: Use any method to find the length of side c. (2 points) Copyright 2017 Apex Learning Inc. Use of this material is subject to Apex Learning's Terms of Use . Any unauthorized copying, reuse, or redistribution is prohibited. Apex Learning and the Apex Learning Logo are registered trademarks of Apex Learning Inc