import math

def fletxa(vini,theta):
    vini = vini*1000/3600 # convertim km/h en m/s
    theta = math.radians(theta) # convertim graus en radians
    tvol = 2*vini*math.sin(theta)/9.8
    rmax = vini**2*math.sin(2*theta)/9.8  
    return tvol,rmax