#!/usr/bin/python3
# -*- coding: utf-8 -*-
# @Time    : 2019-05-07 11:14
# @Author  : hedengfeng
# @Site    : 
# @File    : math_sin_cos_test.py
# @Software: learn_python
# @description: 
import math
PI = math.pi
print(PI)
print(PI/2)
print('******************')
print(round(math.sin(PI), 15))
print(math.sin(2*PI))

print(math.sin(PI/2))

print(math.sin((PI*3)/2))

print(math.sin(0))

print('******************')

print(math.cos(PI))
print(math.cos(2*PI))

print(math.cos(PI/2))

print(math.cos((PI*3)/2))

print(math.cos(0))

