8
QuizMultiple Choice
General Form of Sine and Cosine
Question 8 • Common Core Precalculus - MA3112 Quarter 1
A clock is positioned on an auditorium wall with its center 9 ft above the floor. The second hand on the clock is 10 inches long and continuously moves around the clock. Let x represent the time in seconds measured from noon on a given day.Which function f(x) represents the height above the floor, in feet, of the tip of the second hand?
Answer
A
f (x) = StartFraction 5 Over 6 EndFraction cosine (StartFraction pi Over 60 EndFraction x) + 9
B
f (x) = StartFraction 5 Over 6 EndFraction cosine (StartFraction pi Over 30 EndFraction x) + 9
C
f (x) = StartFraction 5 Over 6 EndFraction cosine (30 pi x) + 9
D
f (x) = StartFraction 5 Over 6 EndFraction cosine (120 pi x) + 9