在尝试评估Python中的定积分时,我收到以下错误代码.
AttributeError Traceback (most recent call last)
<ipython-input-7-2be8718c68ec> in <module>()
7 x, n = symbols('x n')
8
----> 9 f = (cos(n*x))*(x**2-pi**2)^2
10 integrate(f,(x,-n*pi,n*pi))
11
AttributeError: 'Mul' object has no attribute 'cos'
我已经复制了下面的输入代码.谢谢你的帮助.
from pylab import *
from sympy import *
from numpy import *
init_printing(use_unicode=False, wrap_line=False, no_global=True)
x, n = symbols('x n')
f = (cos(n*x))*(x**2-pi**2)^2
integrate(f,(x,-n*pi,n*pi))