cross product of a and b 

c[0]=-0.87

c[1]=-1.74

c[2]=-0.87

check dot of cross 

a.c=d=-9.396

b.c=e=-11.136

a[0]=0.30151134457776

a[1]=0.54272042023997

a[2]=0.78392949590219

len a=1

normalized cross product of a and b 

c[0]=-0.030377735679931

c[1]=-0.060755471359863

c[2]=-0.030377735679931

check dot of cross 

a.c=d=-0.065946469896605

b.c=e=-0.067544363975417