Code for Raycasting hangs when going beyond 90 degrees

Question

everyone. I have been trying to make a ray caster for a project, but I have been stuck with this problem; my code hangs when the angle value goes beyond 90 degrees. why is this happening? is there a solution? here is my code:

class Ray:
def __init__(self, depth, character, world_map):
    self.depth = depth
    self.character = character
    self.map = world_map

def check_horizontal_offset(self, coordinate, sin, tan):
    # if sin > 0, then character is pointing down. else, up.
    if sin > 0:
        offset_y = self.map.cell_size - (coordinate % self.map.cell_size) - 0.0001
    else:
        offset_y = -(coordinate % self.map.cell_size)

    offset_x = offset_y / tan
    hypotenuse = math.sqrt(offset_x ** 2 + offset_y ** 2)

    return offset_x, offset_y, hypotenuse

def check_vertical_offset(self, coordinate, cos, tan):
    # if cos > 0, character is pointing right, else left
    if cos > 0:
        offset_x = self.map.cell_size - (coordinate % self.map.cell_size) - 0.0001
    else:
        offset_x = -(coordinate % self.map.cell_size)

    offset_y = offset_x * tan
    hypotenuse = math.sqrt(offset_x ** 2 + offset_y ** 2)

    return offset_x, offset_y, hypotenuse

def cast_ray(self, origin, sin, cos, tan):
    ray_distance = 0
    x, y = origin

    while ray_distance < self.depth:
        x_1, y_1, hypotenuse_1 = self.check_horizontal_offset(x, sin, tan)
        x_2, y_2, hypotenuse_2 = self.check_vertical_offset(y, cos, tan)

        if hypotenuse_1 < hypotenuse_2:
            ray_distance += hypotenuse_1
            print("hyp 1  ", hypotenuse_1)
            x += x_1
            y += y_1
        else:
            ray_distance += hypotenuse_2
            print("hyp 2  ", hypotenuse_2)
            x += x_2
            y += y_2

    pygame.draw.line(comms.screen, (255, 255, 0), self.character.get_position(), (x, y), 2)

def update(self, angle):
    # calculate all trigonometric values for calculation of intersections
    sin = math.sin(angle)
    cos = math.cos(angle)
    tan = math.tan(angle)

    # safeguard for divide by zero error
    if tan == 0:
        tan = 0.000001

    self.cast_ray(self.character.get_position(), sin, cos, tan)

Any help with this would be appreciated.