49. Let x represent the vertical change of the plane after climbing at a constant angle of 3° for 60 ground miles. tan3° 5 } 6 x0 } 60tan3° 5 x KEYSTROKES: 60 3 x < 3.1 The plane is about 3.1 1 1 or 4.1 miles above sea level. 50. Let x represent the maximum height. sin75° ¬ 5 } 2 x0 } 20sin75° ¬ 5 x KEYSTROKES: 20 75 x < 19.32 The ladder can reach a maximum height of about 19.32 feet. 51. Let x represent the distance from the base of the ladder to the building. cos75° 5 } 2 x0 } 20cos75° 5 x KEYSTROKES: 20 75 x < 5.18 The base of the ladder is about 5.18 feet from the building. 52. Explore: You know the coordinates of the vertices of a right triangle and that / C is the right angle. You need to find the measure of one of the angles. Plan: Use the Distance Formula to find the measure of each side. Then use one of the trigonometric ratios to write an equation. Use the inverse to find m / J . Solve:
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 12/19/2011 for the course MAC 1140 taught by Professor Dr.zhan during the Fall '10 term at UNF.