University:
Winston-Salem Forsyth County Schools
Course:
AP Pre-Calculus
Academic year:

2013
Views:

211

Pages:

2
Author:

SMOt2p1

Name Ke! Do your best!! PreCalculus Review Sec. 4.8 I. Given the indicated parts of a right triangle ABC with z= 90 deg c ; solve the triangle. Show your sketch of the triangle. Approximate the missing sides and angles to the nearest hundredth. 1. A = 37 deg, b = 24 tan 31: 34 2. a = 25, b = 45 A 45 C tan A: c:51.48 a = 18.09 B = 53 deg 30.05 2156 A = 29.05 deg B = 60.95 deg II. Draw a picture, write an equation and then solve for the requested information to the nearest hundredth. 3 A guy wire is attached to the top of a radio antenna and to a point on horizontal ground that is 40 meters from the base of the antenna. If the wire makes an angle of 58' with the ground, approximate the length of the wire, Cos58" X 40 75.48m An airplane takes off at a 10 angle and travels at the rate of 250 foet per second. Approximately bow long does it take the airplane to reach an altitude of 15,000 feet? sin 10 ^ n = 15000/x x 810381.56 ft dirt t = d/r t = 34381.56/350 \\ = boxed 345.53aec aligned 5. Approximate the angle of elevation a of the sun if a person 5 feet tall casts a shadow 4 feet loog on level ground. lim w a = 5 4 51.34 ^ * 15000 1 35 6. A builder wishes to construct a ramp 24 feet long that rises to a height of 5 feet above level ground. Approximate the angle that the ramp should make with the horizontal.. a4 Sin 12.02 1 7. A ship is 50 miles east and 35 miles south of port. If the captain wants to sail directly to port, what bearing should be taken? Port 50 50 35 55.01 N 55.01'W 2 8. A ship leaves port at 1:00 P.M. and sails in the direction N34°W at a rate of 24 mi/hr. Another ship leaves port at 1:30 P.M. and sails in the direction N56°E at a rate of 18 mi/hr. Approximately how far apart are the ships at 3:00 P.M.? b) What is the bearing, to the nearest degree, from the first ship to the second? a) 48+27=d2 55.07mi See balou b) tang 4 2-29.36 34 27 Skr S68.36E