Hi,
I am new in sympy. I would like to calculate the integration of
cos(nx)*cos(mx) on the interval [0,2pi].
I expected the following result : I=0 if n!=m and I!=0 if m=n but the
result is only 0 without distinction between the values of m and n.
I used that piece of code in ipython
from sympy import *
x=Symbol('x')
n=Symbol('n',integer=True)
m=Symbol('m',integer=True)
f1=cos(n*x)
f2=cos(m*x)
f3=f1*f2
I=integrate(f3,(x,0,2*pi))
pprint(I)
0
Did I do something wrong ? What is the good way to obtain the correct
answer ?
Best Regards,
Régis
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