from math import pi,asin,atan,sqrt,sin
# ------------------------------------
def arcsin(x):
    return atan(x/(sqrt(1 - x**2)))
# ------------------------------------
print()
x1 = pi/4
x2 = arcsin(sin(x1))
print("x1 = ", x1)
print("x2 = ", x2)
print("blad bezwzgledny:",abs(x1 - x2))

input("\n\nAby zakończyć naciśnij Enter")