[Python] Summary of mathematical conversion processing (orthogonal coordinate, polar coordinate conversion, etc.) [math, numpy, etc.]

Find Cartesian coordinates (x, y) from polar coordinates (r, Θ)

def getXY(r, degree):
    #Convert degrees to radians
    rad = math.radians(degree)
    x = r * math.cos(rad)
    y = r * math.sin(rad)
    print(x, y)
    return x, y

Find polar coordinates (r, Θ) from Cartesian coordinates (x, y)

def getRD(x, y):
    r = math.sqrt(x**2+y**2)
    rad = math.atan2(y, x)
    degree = math.degrees(rad)
    print(r, degree)
    return r, degree

Find the polar coordinates (r, Θ) from the origin xy to a specific XY

def getxy_RD(x, y, X, Y):
    _x, _y = (X-x), (Y-y)
    r = math.sqrt(_x**2+_y**2)
    rad = math.atan2(_y, _x)
    degree = math.degrees(rad)
    print(r, degree)
    return r, degree