Sieun hits golf balls into the air, Each time she hits a ball she records 0, the angle at which the ball is launched into the air, and I, the horizontal distance, in metres, which the ball travels from the point of contact to the first time it lands. The diagram below represents this information 0 = 75 degrees = 60 degrees 0 = 45 degrees Sieun analyses her results and concludes: d/ de = -0.20 +9, 35

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter8: Applications Of Trigonometry
Section8.2: The Law Of Cosines
Problem 3E
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Sieun hits golf balls into the air, Each time she hits a ball she records 60, the angle at which
the ball is launched into the air, and I, the horizontal distance, in metres, which the ball travels
from the point of contact to the first time it lands. The diagram below represents this information
0 = 75 degrees
0 = 60 degrees
0 = 45 degrees
Sieun analyses her results and concludes:
dl
=-0.20 +9, 35 <OS75.
de
(a)
Determine whether the graph of I against 0 is increasing or decreasing at 0= 50.
Sieun observes that when the angle is 40 , the ball will travel a horizontal distance of 205.5 m.
(b)
Find an expression for the function 1(0).
Transcribed Image Text:Sieun hits golf balls into the air, Each time she hits a ball she records 60, the angle at which the ball is launched into the air, and I, the horizontal distance, in metres, which the ball travels from the point of contact to the first time it lands. The diagram below represents this information 0 = 75 degrees 0 = 60 degrees 0 = 45 degrees Sieun analyses her results and concludes: dl =-0.20 +9, 35 <OS75. de (a) Determine whether the graph of I against 0 is increasing or decreasing at 0= 50. Sieun observes that when the angle is 40 , the ball will travel a horizontal distance of 205.5 m. (b) Find an expression for the function 1(0).
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