#!/usr/bin/python3
#The tan() method returns the tangent of x radians.
#tan(x)
import math

print ("(tan(3) : ", math.tan(3))
print ("tan(-3) : ", math.tan(-3))
print ("tan(0) : ", math.tan(0))
print ("tan(math.pi) : ", math.tan(math.pi))
print ("tan(math.pi/2) : ", math.tan(math.pi/2))
print ("tan(math.pi/4) : ", math.tan(math.pi/4))
