1. #43) A golfer hits an errant tee shot that lands in the rough
#43) A golfer hits an errant tee shot that lands in the rough. A marker in the center of the fairway is 150 yards from the center of the green. While standing on the marker and facing the green, the golfer turns 1100 toward his ball. He then paces 35 yards to his ball. How far is the ball from the green?
To find x:
x2 = – 2(150)(35) Cos 110
x = √
x = yds.
150 yds x
1100
35 yds

2. #46) In attempting to fly from Chicago to Louisville, a distance of 330 miles, a pilot inadvertently took a course that was 100 in error, as indicated in the figure.
If the aircraft maintains an average speed of 220 miles per hour and if the error in direction is discovered after 15 minutes, through what angle should the pilot turn to head toward Louisville?
What new average speed should the pilot maintain so that the total time of the trip is 90 minutes?
(5)276 miles ÷ 1.25 hours = mph
(1) 220 (1/4) is his speed times time to find out how far he flew off course. This equals 55 miles.
Louisville
330 mi
276 mi
(2) To find angle c use:
c2 = – 2(330)(55) Cos 10
c = √
c = 276
100
168º
Chicago
55 mi
(3) To find the angle where he turns:
Cos C = ( – 3302) / (2(55)(276)
C = cos
C = 168º
(4)The angle he would turn is actually = 12º