The equation 2 sin x + n . Which of the following functions is most likely to be x) ? O A. for) = cos x O B. _{(x) = Jain x O C. for) - c052 x+cos x O D. J"(:r)=si'u12 x+ccszx A buoy floats on the surface of the water. The height in meters of the buoy t hours after midnight, relative to sea level, is given by the equation f(x) =5cos-#+4 . Estimate how many hours elapse between the first two times the buoy is exactly 6 m above sea level. O A. 2.2 hours O B. 5.8 hours O C. 6.4 hours O D. 7.6 hours