
    Calculate the directional angle of a delivery vehicle's position relative to the distribution center, where the vehicle's location is represented as a complex number with its real component indicating east-west displacement and imaginary component indicating north-south displacement. This angle is essential for optimizing delivery routes and coordinating fleet movements across the service area.
    

    
import cmath

def angle_complex(a, b):
    """
    Calculate the directional angle of a delivery vehicle's position relative to the distribution center, where the vehicle's location is represented as a complex number with its real component indicating east-west displacement and imaginary component indicating north-south displacement. This angle is essential for optimizing delivery routes and coordinating fleet movements across the service area.
    

    """
import cmath

def angle_complex(a, b):
    """
    Calculate the directional angle of a delivery vehicle's position relative to the distribution center, where the vehicle's location is represented as a complex number with its real component indicating east-west displacement and imaginary component indicating north-south displacement. This angle is essential for optimizing delivery routes and coordinating fleet movements across the service area.
    

    """
    cn = complex(a, b)
    angle = cmath.phase(a + b)
    return angle