text: +0
  
  # Solve the equation on the interval [0,2π).
  
  0
  17
  2
  +219
  
  −5cos x=4
  
  Select all correct solutions;
  
  approximately 0.644
  
  approximately 2.498
  
  approximately 3.785
  
  approximately 5.640
  
  Jan 10, 2021
  
  #1
  +219
  0
  
  im pretty sure its 2.498 and 3.785
  
  Jan 10, 2021
  #2
  +1
  
  -5 cos x = 4
  
  cos x = -4/5
  
  Arcos x = x = arcos (-4/5) = 2.498 R   and  3.785 R
  
  Jan 11, 2021