Dear @Abdi.SheikHassanm,
I guess whether your equations make sense depends on how you are defining AeroCent and PitchAxis. If you are using the variables from the following forum post: NREL 5MW Rotor Geometry - #3 by Jason.Jonkman, I would say the equations should be:
BlCrvAC = (AeroRef - PitchAxis) * Chord * SIN(AeroTwst)
BlSwpAC = (AeroRef - PitchAxis) * Chord * COS(AeroTwst)
, where AeroRef has replaced AeroCent.
Best regards,