#!/usr/bin/python

def odd_powers(n):
	m = n
	while True:
		yield m
		m = m * n * n

def factorials():
	n = 6 #start with 3!
	c = 3
	while True:
		yield n
		c = c + 1
		n = n * c

def signs():
	s = -1
	while True:
		yield s
		s = s * (-1)

def sine(x):
	p = odd_powers(x)
	p.next() 			#skip first power
	f = factorials()
	s = signs()

	while True:
		yield x
		a = p.next()
		b = f.next()
		f.next() 		#skip even factorials
		c = s.next()
		x = x + c * a / b

s = sine(3.0)
while True:
	try:
		print str(s.next())
	except:
		break