本文實(shí)例講述了python使用三角迭代計(jì)算圓周率PI的方法。分享給大家供大家參考。具體如下：

方法1：
代碼如下:# Calculating PI using trigonometric iterations
# FB36 - 20130825
import math
x = 1.0
y = 1.0
z = 1.0
w = 1.0
v = 1.0
u = 1.0
for i in range(30):
 
    x = math.sin(x) + x
    y = math.cos(y) + y
    z = math.cos(z) + math.sin(z) + z
    w = math.cos(w) - math.sin(w) + w
    v =  math.cos(v) * math.sin(v) + v
    u =  math.cos(u) / math.sin(u) + u
    print i
    print x, y * 2.0, z * 4.0 / 3.0, w * 4.0, v * 2.0, u * 2.0
    print

方法2：
代碼如下:# Calculating PI using trigonometric iterations
# FB36 - 20130901
import math
def sin2(x):
    return ((math.e ** complex(0.0, x) - math.e ** complex(0.0, -x)) / 2.0).imag
def cos2(x):
    return ((math.e ** complex(0.0, x) + math.e ** complex(0.0, -x)) / 2.0).real
x = 1.0
y = 1.0
x2 = 1.0
y2 = 1.0
for i in range(5):
    x = math.sin(x) + x
    y = math.cos(y) + y
    x2 = sin2(x2) + x2
    y2 = cos2(y2) + y2
    print i, x, x2, y * 2.0, y2 * 2.0

希望本文所述對(duì)大家的Python程序設(shè)計(jì)有所幫助。