kill(all)$ load(atrig1)$ load(ntrig)$

Van = facebook.com/LearningCalculus$

f[i,j]:=sin(i*x)*cos(j*x)$

g(x):=sin(i*x)*cos(j*x)$

integrate(g(x),x);

genmatrix(f,6,6);

integrate(%,x);

integrate(%,x);