Bài 25

import math

x_do  = float(input("Nhap goc x (do): "))
x_rad = math.radians(x_do)

sin_x = math.sin(x_rad)
cos_x = math.cos(x_rad)

print(f"sin({x_do}) = {round(sin_x, 4)}")
print(f"cos({x_do}) = {round(cos_x, 4)}")

if abs(cos_x) > 1e-9:
    print(f"tan({x_do}) = {round(sin_x/cos_x, 4)}")
    print(f"sec({x_do}) = {round(1/cos_x, 4)}")
else:
    print("tan va sec khong xac dinh (cos = 0)")

if abs(sin_x) > 1e-9:
    print(f"cot({x_do}) = {round(cos_x/sin_x, 4)}")
    print(f"csc({x_do}) = {round(1/sin_x, 4)}")
else:
    print("cot va csc khong xac dinh (sin = 0)")

kiem_tra = round(sin_x**2 + cos_x**2, 6)
print(f"sin^2 + cos^2 = {kiem_tra}  ({'Dung' if kiem_tra == 1.0 else 'Sai'})")