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import math
alpha = float(input("Angle alpha en deg = "))
v0 = float(input("Vitesse initiale = "))
g = 9.81
alpha *= math.pi/180 # Conversion en radians
v0x = v0*math.cos(alpha)
v0y = v0*math.sin(alpha)
t = 1
x = v0x*t
y = v0y*t - g*t**2/2
y *= (y>0)
print ("Apres 1s, la balle de tennis sera en ({0},{1})".format(x,y))
t = 2
x = v0x*t
y = v0y*t - g*t**2/2
y *= (y>0)
print ("Apres 2s, la balle de tennis sera en ({0},{1})".format(x,y))
t = 5
x = v0x*t
y = v0y*t - g*t**2/2
y *= (y>0)
print ("Apres 5s, la balle de tennis sera en ({0},{1})".format(x,y))