If   cosα=0.588\displaystyle {\cos{\alpha}}={0.588}   and   cosβ=0.537\displaystyle {\cos{\beta}}={0.537}   with both angles’ terminal rays in Quadrant-I, find the values of
(a)
sin(α+β)=\displaystyle {\sin{{\left(\alpha+\beta\right)}}}=
(b)
sin(βα)=\displaystyle {\sin{{\left(\beta-\alpha\right)}}}=
Your answers should be accurate to 4 decimal places.