this is beginners demo of how to calculate trajectory using python. this code is not validated and there are no exception catching mechanisms, it for learning purposes

trajectory.py

# calculate trajetory
# @author: Mashoko Blessing
# @ http://www.facebook.com/blessing.mashcom
# @mashcom digimedia http://www.hookd-up.com

from math import sin,cos,pi

def calculateTraf(angle, velocity ):
	
	#defining gravity
	gravity = float(9.8)
	
	#converting angle to radians
	angle =angle * pi / 180

	#calculating horizontal and vertical components of the velocity
	velocity_h= velocity*cos(angle)
	velocity_v = velocity*sin(angle)
	
	#computing time and distance of flight
	time_of_flight =2 * float(velocity_v) / gravity
	range = float(time_of_flight) * velocity_h
	
	return range, time_of_flight
	
print("Welcome,this app is not validated to work properly, its for demostration purposes Blessing Mashoko available at http://www.facebook.com/blessing.mashcom\n\n")
print("please enter the angle you are dealing with")
angle =input()

print("enter the velocity")
velocity = input()

ans_range, ans_tof = calculateTraf(float(angle),float(velocity))
print("the range is %.1f metres and time of flight is %.0f  seconds" % (ans_range,ans_tof));