#exercice 4.1
import numpy as np 
#mettre les degrés en radian 
a=28*np.pi/180
ua=2*np.pi/180

da=np.random.normal(a,ua,10000)
F=np.tan(da)
f=F.mean()
uf=F.std(ddof=1)

print("f = " + str(f) + " ; u(f) = " + str(uf))