code: def time_at_shadow_length(day, latitude, multiplier):
      
      latitude_rad = radians(latitude)
      declination = radians(sun_declination(day))
  
      angle = arccot(
          multiplier +
          tan(abs(latitude_rad - declination))
      )
  
      numerator = sin(angle) - sin(latitude_rad)*sin(declination)
      denominator = cos(latitude_rad) * cos(declination)
  
      return degrees(acos(numerator/denominator)) / 15
docs: Compute the time at which an object's shadow is a multiple of its length.
  
      Specifically, determine the time the length of the shadow is a multiple of
      the object's length + the length of the object's shadow at noon
  
      This is used in the calculation for Asr time. Hanafi uses a multiplier of
      2, and everyone else uses a multiplier of 1
  
      Algorithm taken almost directly from PrayTimes.org code
  
      :param day: The day which to compute for
      :param latitude: The latitude of the place of interest
      :param: multiplier: The multiplier of the object's length
      :returns: The floating point time delta between Zuhr and the time at which
                the lenghth of the shadow is as defined