<human>:  change cartesian coordinates to range and azimuth.
<bot>: Here is a Python function to change cartesian coordinates to range and azimuth

import math

def change_cartesian_coordinates_to_range_azimuth(x, y, z):
  """
  Changes cartesian coordinates to range and azimuth.
  """
  import math
  r = math.sqrt(x**2 + y**2 + z**2)
  phi = math.atan2(y, x)
  theta = math.acos(z / r)
  return r, phi, theta

# Enter the x, y, z
x = 1
y = 2
z = 3

# Calling the function
r, phi, theta = change_cartesian_coordinates_to_range_azimuth(x, y, z)

# Printing the r, phi, theta
print((r, phi, theta))

#Example Output
# (3.7416573867739413, 1.1071487177940904, 0.6405223126794245)

#Remember to inspect code for bugs.