if A,B,C are the angles then find the value of ∣∣∣∣a^2bsinAccosAbs

Question

if a,b,c are sides of the triangle and A,B,C are the angles opp to them, then find the value of determinant

    ∣a^2  bsinA  ccosA |

    |  bsinA 1 cos(B-C) |

    | csinA cos(B-C) 1 ∣